Envision Math Grade 5 Answer Key Topic 1.3 Decimal Place Value

September 3, 2024

Envision Math 5th Grade Textbook Answer Key Topic 1.3 Decimal Place Value

How can you represent decimals?
Jessie bought 2.568 pounds of horned melon. What are some different ways to show 2.568?
$Envision Math Grade 3 Answer Key Topic 1.3 Decimal Place Value 1$

Another Example
What are equivalent decimals?
$Envision Math Grade 3 Answer Key Topic 1.3 Decimal Place Value 3$
Equivalent decimals name the same amount. Name two other decimals equivalent to 1.4.
One and four tenths have 1 and 40 hundredths.
So 1.4 = 1.40.
One and four tenths have 1 and 400 thousandths.
So 1.4 = 1.400.
So 1.4 = 1.40 = 1.400.

Guided Practice*

Write the word form for each number and tell the value of the underlined digit.

Question 1.
4.737
Answer:

Question 2.
9.806
Answer:

Write each number in standard form.

Question 3.
6 + 0.6 + 0.03 + 0.007
Answer:

Decimal Place Value 1

Question 4.
four and sixty-eight hundredths
Answer:

Write two decimals that are equivalent to the given decimal.

Question 5.
3.700
Answer:

Question 6.
5.60
Answer:

Do you understand?

Question 7.
Wrting to Explain The number 3.453 has two 3s. Why does each 3 have a different value?
Answer:

Question 8.
How do you read the decimal point in word form?
Answer:

Question 9.
José finished a race in 2.6 hours and Pavel finished the same race in 2.60 hours. Which runner finished the race first? Do you know HOW?
Answer:

$Envision Math Grade 3 Answer Key Topic 1.3 Decimal Place Value 12$

Independent Practice

Question 10.
2.300
Answer:

Decimal Place Value 2

Question 11.
9.027
Answer:

Question 12.
1.982
Answer:

Question 13.
6.17
Answer:

Write each number in standard form.

Question 14.
two and six hundred thousandths
Answer:

Question 15.
five and one hundred four thousandths
Answer:

Question 16.
3 + 0.3 + 0.009
Answer:

Question 17.
9 + 0.2 + 0.04
Answer:

Question 18.
7 + 0.6 + 0.05 + 0.007
Answer:

Write two decimals that are equivalent to the given decimal.

Question 19.
2.200
Answer:

Question 20.
8.1
Answer:

Question 21.
9.50
Answer:

Decimal Place Value 3

Problem Solving

Question 22.
Writing to Explain Kay is buying juice at the market. She has $9 and each bottle of juice costs $2. Does she have enough money to buy 5 bottles of juice? Explain.
Answer:

Question 23.
Which point on the number line below best represents 0.368?
$Envision Math Grade 3 Answer Key Topic 1.3 Decimal Place Value 15$
Answer:

Question 24.
The Borneo stick insect has a total length including legs, of 21.5 inches. Write 21.5 in word form.
Answer:

Question 25.
Worker leafcutter ants can measure 0.5 inches. Name two decimals that are equivalent to 0.5.
Answer:

Question 26.
Writing to Explain Why are 7.63 and 7.630 equivalent?
Answer:

Envision Math Grade 5 Answer Key Topic 1.2 Comparing and Ordering Whole Numbers

September 3, 2024

Envision Math 5th Grade Textbook Answer Key Topic 1.2 Comparing and Ordering Whole Numbers

How can you compare and order whole numbers?
Which city has the greater population, Charlotte or Nashville?
$Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 1$
Answer:

Another Example
How do you order numbers?

Order the cities by their populations from greatest to least.
To order whole numbers, line up the digits by place value. Start from the left and compare digits until they are different.

Step 1.
Write the numbers. 545,524 ←
Line up the places. 540,828
Begin at the left 529,121
and compare.

Step 2.
Look at the two
remaining numbers. 540,828 ←
Compare. 529,121

Step 3.
Write the numbers from
greatest to least. 545,524 540,828 529,121

In order of their populations from greatest to least, the cities are Nashville, Charlotte, and Portland.

Comparing and Ordering Whole Numbers 1

Explain it

Question 1.
Explain why 89,010,000 is greater than 89,000,101.
Answer:

Question 2.
How can you order three whole numbers, each with a different number of digits, without comparing digits?
Answer:

Step 1
Line up the places
545,524
540,828
Begin at the keft.
Compare.
Use > for greater than.
Use < for less than.

Step 2
Find the first place 545,524 Where the digits 540,828 are different Compare 5 > 0
Think 5 thousands > 0 thousands

Think
5 thousands > 0 thousands

So, 545,524 > 540,828. Nashville has a greater population than Charlotte.

Guided Practice*

Do you know HOW?
Copy and complete. Write <, > or = for each $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ .

Question 1.
9,445,000 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 10,000,000

Question 2.
496,256,001 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 496,155,001

Question 3.
20,003,888,065 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 20,003,868,001

Do you Understand?

Question 4.
Writing to Explain Why do you compare numbers beginning from the left after you line them up by place value?

Question 5.
Long Beach has a population of 491,564 and Fresno has a population of 464,727. Which city has a greater population?

Independent Practice

Copy and complete. Write <, > or

Question 6.
3,456 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 3,543

Question 7.
9,999 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 10,000
Answer:

Question 8.
98,325 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 98,325
Answer:

Question 9.
789,124 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 789,300
Answer:

Question 10.
4,701,045,756 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 4,701,045
Answer:

Question 11.
3,000,010 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 3,000,000,010
Answer:

Comparing and Ordering Whole Numbers 2

Question 12.
29,374,087,210 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 28,124,087,210

Question 13.
13,059 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 9,898
Answer:

Question 14.
6,012,907,000 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 6,012,907,000
Answer:

Question 15.
8,937,051 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 8,937,501
Answer:

Question 16.
1,790,023,901 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 1,090,023,901
Answer:

Question 17.
45,034,521 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 45,034,251
Answer:

Question 18.
990,148,632,109 $Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 5$ 990,149,632,109

Independent Practice

Order from greatest to least.

Question 19.
65,081,127 7,000,128 9,910,001
Answer:

Question 20.
90,459,012,045 91,459,012,045 90,459,010,045

Question 21.
15,100,000,022 1,510,000,022 10,010,899,002

Question 22.
186,347,987 100,389,120 18,121,817 1,500,987

Problem Solving

Question 23.
Number Sense Write three numbers that are greater than 154,000 but less than 155,000.
Answer:

Question 24.
The U.S. Postal Service delivers about 212,000,000,000 pieces of mail every year. Which digit is in the ten billions place?
Answer:

Question 25.
Writing to Explain Here is how Marek ordered three numbers from least to greatest:
870,990; 4,970,070; 1,426,940
What mistake did Marek make? Explain how to correct his mistake.

Question 26.
Four brothers each bought a $9 movie ticket and a $4 bag of popcorn. Bottled water cost $2. Together, the brothers had $60. How much was left?

Question 27.
Algebra Find all the digits that can replace the missing digit to make this comparison true.
$Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 10$

Question 28.
Which of the numbers below is the greatest?
$Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 15$
A. 9,178
B. 9,817
C. 9,781
D. 8,971
Answer:

Question 29.
Glory Bicycle Company made $589,029 in sales. Right Bicycles made $590,011. Coastal Bikes made more than Glory Bicycle Company, but less than Right Bicycles. How much did Coastal Bikes make?
A. $589,020
B. $589,300
C. $590,101
D. $590,100
Answer:

Question 30.
The surface area of the moon is 37,900,000 square kilometers. Which has a larger surface area?
$Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 16$
Answer:

Question 31.
Reasoning If a number is greater than 800,000,000,000 but less than 801,000,000,000, what digit will be in the billions place?
Answer:

Mixed Problem Solving

For 1 through 4, use the table at the right.

$Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 17$

Question 1.
By how much did the United States population increase from 1790 to 1820?
Answer:

Question 2.
What is the difference between the population of the United States in 1850 and 1790?
Answer:

Question 3.
Which decade had the greatest growth in population?
Answer:

Question 4.
Which decade had the least amount of growth in population?
Answer:

For 5 through 8, use the table at the right.
$Envision Math 5th Grade Answer Key Topic 1.2 Comparing and Ordering Whole Numbers 18$

Question 7.
How many more immigrants came from Germany than Scotland?
Answer:

Question 8.
Were there more immigrants from Germany and Scotland or from England?
Answer:

Question 9.
Strategy Focus Solve using the strategy, Try, Check, and Revise. Jake bought 2 items that cost a total of $24. One item cost $2 more than the other. What was the cost of each item?
Answer:

Envision Math Grade 6 Answer Key Topic 2.1 Using Variables to Write Expressions

September 2, 2024

Envision Math 6th Grade Textbook Answer Key Topic 2.1 Using Variables to Write Expressions

Review What You Know

Vocabulary
Choose the best term from the box.
$Envision Math Grade 6 Answers Topic 2.1 Using Variables to Write Expressions 1$

Question 1.
A(n) ? is a mathematical phrase that includes at least one variable and one operation.
Answer:
algebraic expression
Explanation:

Question 2.
The ? of a number uses exponents to write the repeated multiplication of the number called the base.
Answer:
exponential form
Explanation:

Question 3.
Numbers that are easy to compute men-tally are called ? numbers.
Answer:
compatible
Explanation:

Using Variables to Write Expressions 1

Question 4.
A(n) ? is a symbol, such as n, that takes the place of a number or value.
Answer:
variable
Explanation:

Variables

Evaluate each expression for x = 4 and x = 7.
Question 5.
3x + 8
Answer:
20, 29
Explanation:

Question 6.
24 – 3x
Answer:
12, 3
Explanation:

Question 7.
5 + 5 + x
Answer:
14, 17
Explanation:

Question 8.
84 – x
Answer:
21, 12
Explanation:

Question 9.
2x + 5 – x
Answer:
9, 12
Explanation:

Question 10.
9x
Answer:
36, 63
Explanation:

Question 11.
2x + 4
Answer:
12, 18
Explanation:

Using Variables to Write Expressions 2

Question 12.
28 – x
Answer:
7, 4
Explanation:

Answer Terms

Writing to Explain Write an answer for each question.
Question 13.
How are these terms alike: differences, sums, quotients, and products?
Answer:
See margin.
Explanation:

Question 14.
What does it mean to evaluate an algebraic expression?
Answer:
See margin.
Explanation:

Using Variables to Write Expressions

How can you write an algebraic expression?
Donnie bought CDs for $10 each. How can you represent the total cost of the CDs?
Answer:
A variable is a quantity that can change or vary and is often represented with a letter. Variables help you translate word phrases into algebraic expressions.
$Envision Math Grade 6 Answers Topic 2.1 Using Variables to Write Expressions 2$

Other Examples
The table shows algebraic expressions for given situations.
$Envision Math Grade 6 Answers Topic 2.1 Using Variables to Write Expressions 3$

Guided Practice

Do you know HOW?
Write an algebraic expression for each situation.
Question 1.
the difference of a number tand 22
Answer:
t – 22
Explanation:

Question 2.
m bicycles added to 18 bicycles
Answer:
18 + m
Explanation:

Question 3.
11 times a number z
Answer:
11z
Explanation:

Question 4.
4 less than 5 times a number g
Answer:
5g – 4
Explanation:

Do you UNDERSTAND?
Question 5.
In the problem at the top of the page, what does the variable n represent?
Answer:
The number of CDs Donnie bought
Explanation:

Question 6.
Identify the variable and the operation in the algebraic expression 8y.
Answer:
See margin.
Explanation:

Question 7.
Write an algebraic expression for this situation: n more students than the 8 students sitting in each of the 3 rows.
Answer:
n + 3(8)
Explanation:

CDs cost $10 each. The operation is multiplication.
$Envision Math Grade 6 Answers Topic 2.1 Using Variables to Write Expressions 4$

Use the variable n to represent the number of CDs and write an algebraic expression.
$10 × n
An algebraic expression is a mathematical phrase that has at least one variable and one operation.
The total cost of the CDs is represented by
10 × n or 10n.
The operation is multiplication. The variable is n.

Independent Practice

For 8 through 13, write algebraic expressions.
Question 8.
A number p increased by 22
Answer:
p + 22
Explanation:

Question 9.
15 divided by a number r
Answer:
15 ÷ r
Explanation:

Question 10.
12 more points than a number p times 8
Answer:
8p + 12
Explanation:

Question 11.
6 less than 7 times a number b
Answer:
7b – 6
Explanation:

Question 12.
5 more than the product of x and 9
Answer:
9x + 5
Explanation:

Question 13.
7 times the difference of yand 4
Answer:
7 (y – 4)
Explanation:

Problem Solving

Question 14.
The distance around a closed shape can be expressed as 3 times side s, or 3s. Draw an example of this geometric shape.
Answer:
Students should draw an equilateral triangle.
Explanation:

Question 15.
Manuel sold 5 cartons of apple juice and 8 cartons of orange juice. Write an algebraic expression to represent how many cartons of each kind were sold.
Answer:
Sample answer: 5a + 8r
Explanation:

Question 16.
One float for the Tournament of Roses parade uses as many flowers as a florist usually uses in 5 years. If x is the number of flowers a florist uses in 1 year, write an algebraic expression for the number of flowers used to make a float.
Answer:
5x
Explanation:

Question 17.
Writing to Explain Devin’s DVD case has 3 rows of slots, but 5 slots are broken. If x equals the number of slots in a row, explain how the expression 3x – 5 relates to Devin’s DVD case.
Answer:
See margin.
Explanation:

Question 18.
A hen laid the same number of eggs each day for a week. Kelly collected the eggs for six days. Write an expression to show the number of eggs Kelly did not collect.
Answer:
7x – 6x
Explanation:

Question 19.
Think About the Process Which expression shows a quantity of rolls added to 8 bagels?
A. 8 – r
B. 8r
C. 8 + r
D. r ÷ 8
Answer:
C. 8 + r
Explanation:

Envision Math Grade 6 Answer Key Topic 1.6 Problem Solving

September 2, 2024

Envision Math 6th Grade Textbook Answer Key Topic 1.6 Problem Solving

Problem Solving

Make an Organized List
Answer:
Suppose you throw three darts at the target pictured on the right. All of the darts hit the target. How can you find all of the different total points that you could score?
$Envision Math Grade 6 Answers Topic 1.6 Problem Solving 1$

Guided Practice

Do you know HOW?
Suppose two darts hit a target that has two rings.The outer ring is 50 points, and the inner ring is 150 points. Use this information to answer 1 and 2.
Question 1.
Make an organized list to show all of the possible scores.
Answer:
See margin.
Explanation:

Question 2.
How many possible totals are there?
Answer:
3; 100,200,300
Explanation:

Do you UNDERSTAND?
Question 3.
In the example at the top, how is the list organized?
Answer:
See margin.
Explanation:

Grade 6 Answer Key 1.6 Problem Solving 1

Question 4.
Write a Problem Write a problem that you can solve by making an organized list.
Answer:
See margin.
Explanation:

Independent Practice

Solve 5 by making an organized list. The list has been started for you.
Question 5.
Yolanda needs a 3-digit code for her locker. She wants to use the first three digits of her phone number, 763. How many different combinations using each of these digits does Yolanda have to choose from?
Answer:
6
$Envision Math Grade 6 Answers Topic 1.6 Problem Solving 2$

Read and Understand
What do you know?
There are 3 different point values on the target. All three darts hit the target.

What are you trying to find?
What are the different total points that you could score?

Plan and Solve
Make an organized list to find all the possible scores.
There are ten different totals possible.
$Envision Math Grade 6 Answers Topic 1.6 Problem Solving 3$

Solve 6 using the art on the right.
Question 6.
Randy went to the school fun fair and played the beanbag toss. He tossed 3 beanbags, and each went into a hole on the board. What are the possible total numbers of points he could have scored?
$Envision Math Grade 6 Answers Topic 1.6 Problem Solving 4$
Answer:
See margin.
Explanation:

Question 7.
Ariana, Mia, Ethan, and Nick are planning a one- on-one basketball tournament. In the tournament, each player will play the other three just once. How many games will be played?
Answer:
6
Explanation:

Question 8.
Estimate About how many eggs would be laid by 7 chickens if each chicken lays 36 eggs?
Answer:
Sample answer: about 280
Explanation:

Question 9.
Is your estimate of the number of eggs 7 chickens could lay more or less than the actual answer? Explain.
Answer:
See margin.
Explanation:

Grade 6 Answer Key 1.6 Problem Solving 2

Question 10.
Look for a pattern in the table of values at the right. Find a rule for the table.
$Envision Math Grade 6 Answers Topic 1.6 Problem Solving 5$
Answer:
Add 5 to Input to get the Output
Explanation:

Question 11.
Writing to Explain How could you find the number of different ways to arrange 4 students in a row for a photo?
Answer:
See margin.
Explanation:

Question 12.
Dani has only quarters, dimes, and nickels in her bank. She needs $0.60 for the bus. She wants to use at least one quarter. How many different ways can Dani combine the coins to pay for the bus?
Answer:
6
Explanation:

Question 13.
Think About the Process Cassie is making an organized list of all the different ways to arrange the letters WXYZ. Following Cassie’s organization, which arrangement of letters will she place on the list next?
$Envision Math Grade 6 Answers Topic 1.6 Problem Solving 6$
A. WZYX
B. XWYZ
C. YWXZ
D. ZWYZ
Answer:

Envision Math Grade 6 Answer Key Topic 1.5 Comparing and Ordering Decimals

September 2, 2024

Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals

Comparing and Ordering Decimals

How can you compare decimals?
Answer:
Batting averages for a single season are shown for some baseball players. Which of the two batting averages circled is greater?
$Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 1$

Another Example
How do you order decimals using place value?
Answer:
One Way
Use a number line to order 4.002,3.985, and 4.01 from least to greatest.
$Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 2$
3.985 is left of 4.002 and 4.002 is left of 4.01. So, 3.985 < 4.002 < 4.01.
Another Way
Order 4.002,3.985, and 4.01 from least to greatest by lining up the numbers so their decimal points align. Then compare digits from left to right and order the digits of each place value.
$Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 3$
Write your answer: 3.985, 4.002, 4.010

Guided Practice

Do you know HOW?
In 1 through 4, use >, <, or =.
Question 1.
1.09 _____ 1.9
Answer:

Comparing and Ordering Decimals 1
1.09 $Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 4$ 1.9
Explanation:

Question 2.
18.001 _____ 18.01
Answer:
18.001 $Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 4$ 18.01
Explanation:

Question 3.
7.25 _____ 7.3
Answer:
7.25 $Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 4$ 7.3
Explanation:

Question 4.
0.1 _____ 0.1000
Answer:
0.1 $Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 5$ 0.1000
Explanation:

Question 5.
Order 7.08, 6.257, 7.6, 6.1, 6.29 from least to greatest.
Answer:
6.1, 6.257, 6.29, 7.08, 7.6
Explanation:

Do you UNDERSTAND?
Question 6.
Explain why 46.69 is less than 46.7.
Answer:
0.7 = 0.70 and 0.69 < 0.70
Explanation:

Question 7.
In the example at the top of the page, what place value determines which batting average is greater?
Answer:
thousandths
Explanation:

One Way
Compare 0.342 and 0.344 by locating them on a number line.
$Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 6$
0.344 is right of 0.342 on the number line.
So, 0.344 > 0.342.

Another Way
Line the numbers up so their decimal points align.
$Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 7$
So, 0.344 > 0.342.

Independent Practice

In 8 through 15, use >, <, or = to compare each pair of numbers.
Question 8.
5.084 _____ 5.84
Answer:
5.084 $Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 4$ 5.84
Explanation:

Question 9.
52.01 ______ 51.99
Answer:
52.1 $Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 8$ 51.99
Explanation:

Comparing and Ordering Decimals 2

Question 10.
0.721 _____ 0.7021
Answer:
0.721 $Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 8$ 0.7021
Explanation:

Question 11.
1.22 ____ 1.222
Answer:
1.2 $Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 4$ 1.222
Answer:
Explanation:

Question 12.
2.99 _____ 2.9900
Answer:
2.99 $Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 5$ 2.9900
Explanation:

Question 13.
438.783 _____ 438.738
Answer:
438.783 $Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 8$ 438.738
Explanation:

Question 14.
3.1428 _____ 3.1420
Answer:
3.1428 $Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 8$ 3.1420
Explanation:

Question 15.
3.35 ____ 2.44
Answer:
3.35 $Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals 8$ 2.44
Explanation:

Order these numbers from least to greatest.
Question 16.
12.23, 12.223, 12.322
Answer:
12.223, 12.23, 12.322
Explanation:

Question 17.
1.01, 1.0, 1.011, 1.001
Answer:
1.0, 1.001, 1.01, 1.011
Explanation:

Question 18.
35.43, 35.435, 35.44, 35.451
Answer:
35.43, 35.435, 35.44, 35.451
Explanation:

Question 19.
0.7841, 0.834, 0.705, 0.81
Answer:
0.705, 0.7841, 0.81, 0.834
Explanation:

Problem Solving

Question 20.
Writing to Explain A redwood tree has a diameter of 30.2 ft. Lyndell says this tree has a smaller diameter than a tree with a diameter of 30.20 because 2 is less than 20. Is Lyndell correct? Explain.
Answer:
No, they are equal. 0.2 = 0.20

Question 21.
Arliss ran the fitness run in 9.65 seconds. Bonita ran it in 9.9 seconds. Cory ran it in 9.625 seconds, and Darla ran it in 10 seconds. Who ran it in the least amount of time?
A. Arliss
B. Bonita
C. Cory
D. Darla
Answer:
C. Cory

Question 22.
Reasoning Is a decimal with 4 digits always greater than a decimal with 3 digits? Give an example to explain.
Answer:
No. Sample answer: 0.1234 < 0.124
Explanation:

Question 23.
Number Sense Name three decimals between 0.55 and 0.56.
Answer:
Sample answer: 0.551, 0.552, 0.553
Explanation:

Envision Math Grade 3 Answer Key Topic 2.3 Rounding 4-Digit Numbers

September 2, 2024

Envision Math 3rd Grade Textbook Answer Key Topic 2.3 Rounding 4-Digit Numbers

Rounding 4-Digit Numbers

How can you round four-digit numbers?
Answer:
The table shows ticket sales for two sports games. To the nearest thousand, about how many tickets were sold for the baseball game?
$Envision Math Grade 3 Answer Key Topic 2.3 Rounding 4-Digit Numbers 1$

Question.
Round 2,379 to the nearest thousand to find out.
Answer:

Guided Practice

Do you know HOW?
Round to the nearest hundred.
Question 1.
4,569
Answer:

Question 2.
2,310
Answer:

Question 3.
9,992
Answer:

Round to the nearest thousand.
Question 4.
4,737
Answer:

Rounding 4-Digit Numbers 0

Question 5.
8,333
Answer:

Question 6.
4,099
Answer:

Question 7.
3,914
Answer:

Question 8.
1,111
Answer:

Question 9.
6,274
Answer:

Do you UNDERSTAND?
Question 10.
How does the halfway number on the number line help you round 2,379?
Answer:

Question 11.
Writing to Explain Describe how to round 2,379 to the nearest hundred.
Answer:

Question 12.
In the example above, about how many tickets were sold for the football game, to the nearest hundred? to the nearest thousand?
Answer:

Independent Practice

For 13–22, round to the nearest hundred.
Question 13.
3,708
Answer:

Question 14.
5,542
Answer:

Question 15.
7,356
Answer:

Question 16.
8,929
Answer:

Question 17.
6,991
Answer:

Question 18.
4,008
Answer:

Question 19.
7,890
Answer:

Question 20.
6,555
Answer:

Rounding 4-Digit Numbers 3

Question 21.
3,945
Answer:

Question 22.
9,961
Answer:

For 23–32, round to the nearest thousand.
Question 23.
2,774
Answer:

Question 24.
3,870
Answer:

Question 25.
5,077
Answer:

Question 26.
7,299
Answer:

Question 27.
8,603
Answer:

Question 28.
6,905
Answer:

Question 29.
8,500
Answer:

Question 30.
4,099
Answer:

Question 31.
2,495
Answer:

Question 32.
9,573
Answer:

One Way
You can use a number line to round.
$Envision Math Grade 3 Answer Key Topic 2.3 Rounding 4-Digit Numbers 2$
2,379 is closer to 2,000 than to 3,000.
2,379 rounds to 2,000.
About 2,000 tickets were sold for the baseball game.

Another Way
You can use place value to round.
$Envision Math Grade 3 Answer Key Topic 2.3 Rounding 4-Digit Numbers 3$

Find the digit in the rounding place.
If the next digit to the right is 5 or greater, increase the digit in the rounding place by 1. If the next digit is less than 5, keep the digit in the rounding place as it is.
Change all the digits to the right of the rounding place to zero.

So, 2,379 rounds to 2,000.
About 2,000 tickets were
sold for the baseball game.

Problem Solving

In 33–36, write a number that rounds to the number given. Use all four of the digits at the right once in each answer.
$Envision Math Grade 3 Answer Key Topic 2.3 Rounding 4-Digit Numbers 4$
Question 33.
4,000
Answer:

Question 34.
6,000
Answer:

Question 35.
5,500
Answer:

Question 36.
5,400
Answer:

Question 37.
The Golden Gate Bridge is 4,200 feet long. What is 4,200 rounded to the nearest thousand?
Answer:

Question 38.
Writing to Explain Describe the steps you would follow to round 3,647 to the nearest hundred.
Answer:

Question 39.
Number Sense Write a number that rounds to 7,000 when it is rounded to the nearest thousand.
Answer:

Question 40.
In 1 hour, an adult’s heart beats about 4,320 times.
a. To the nearest thousand, about how many times does an adult’s heart beat in one hour?
b. To the nearest hundred, about how many times does an adult’s heart beat in one hour?
Answer:

Question 41.
Which number rounds to 5,000 when it is rounded to the nearest thousand or to the nearest hundred?
A. 4,895
B. 5,029
C. 5,170
D. 5,956
Answer:

Envision Math Grade 3 Answer Key Topic 1.3 Greater Numbers

September 2, 2024

Envision Math 3rd Grade Textbook Answer Key Topic 1.3 Greater Numbers

Greater Numbers

How can you read and write greater numbers?
Answer:
Capitol Reef National Park in Utah covers 241,904 acres of land.
$Envision Math 3rd Grade Answer Key Topic 1.3 Greater Numbers 1$

Guided Practice

Do you know HOW?
Write each number in standard form.
Question 1.
three hundred forty-two thousand, six hundred seven
Answer:

Question 2.
ninety-eight thousand, three hundred twenty
Answer:

Greater Numbers 1

Question 3.
500,000 + 40,000 + 600 + 90 + 3
Answer:

Question 4.
What is the value of the 9 in the number 379,050?
Answer:

Do you UNDERSTAND?
Question 5.
Number Sense Ramos says the value of the digit 7 in 765,450 is 70,000. Do you agree? Why or why not?
Answer:

Question 6.
Writing to Explain Describe how 130,434 and 434,130 are alike and how they are different.
Answer:

Independent Practice

Write each number in standard form.
Question 7.
twenty-seven thousand, five hundred fifty
Answer:

Question 8.
800,000 + 20,000 + 6,000 + 300 + 50
Answer:

Greater Numbers 2

Write each number in expanded form.
Question 9.
46,354
Answer:

Question 10.
395,980
Answer:

Write the place of the underlined digit. Then write its value.
Question 11.
404,705
Answer:

Question 12.
163,254
Answer:

Question 13.
45,391
Answer:

Greater Numbers 3

Question 14.
983,971
Answer:

Question 15.
657,240
Answer:

How can you show 241,904 in different ways?
place-value chart:
$Envision Math 3rd Grade Answer Key Topic 1.3 Greater Numbers 2$

standard form: 241, 904
expanded form: 200,000 + 40,000 + 1,000 + 900 + 4
word form: two hundred forty-one thousand, nine hundred four

Algebra Find each missing number.
Question 16.
26,305 = 20,000 + ☐ + 300 + 5
Answer:

Question 17.
801,960 = 800,000 + 1,000 + ☐ + 60
Answer:

Question 18.
400,000 + ☐ + 30 + 2 = 470,032
Answer:

Question 20.
300,000 + ☐ + 600 + 3 = 304,603
Answer:

Question 19.
618,005 = ☐ + 10,000 + 8,000 + 5
Answer:

Question 21.
200,000 + 4,000 + 60 + 3 = ☐
Answer:

Problem Solving

For 22-24, use the table.
$Envision Math 3rd Grade Answer Key Topic 1.3 Greater Numbers 3$

Question 22.
Write the population of each city in the table in expanded form.
Answer:

Question 23.
Write the population of Columbus, OH in word form.
Answer:

Greater Numbers 4

Question 24.
Which cities listed have fewer than eight hundred thousand people?
Answer:

Question 25.
A new world record was set when 303,628 dominos fell. Write 303,628 in expanded form.
Answer:

Question 26.
Which is the word form of 805,920?
A. eighty-five thousand, ninety-two
B. eight hundred five thousand, ninety-two
C. eight thousand, five hundred ninety-two
D. eight hundred five thousand, nine hundred twenty
Answer:

Envision Math Grade 1 Answer Key Topic 1.6 Problem Solving

September 2, 2024

Envision Math 1st Grade Textbook Answer Key Topic 1.6 Problem Solving

Problem Solving

Use Objects

Home Connection Your child used counters to model numbers and to solve problems.
Home Activity Tell your child the following story problem: Ken has 5 toys. Show the toys using objects
Question 1.
___________
Answer:

Question 2.
___________
Answer:

$Math Grade 1 Answer Key 1.6 Problem Solving 2$

Question 3.
____________
Answer:

Question 4.
____________
Answer:

$Envision Math Grade 1 Answers Topic 1.6 Use Objects 1$

Guided Practice

Use counters to model the problem. Then draw a picture to show your counters.
Question 1.
Bo has 5 marbles. Show the marbles Bo has.
$Envision Math Grade 1 Answers Topic 1.6 Use Objects 2$
Answer:

Question 2.
Penny buys 8 stamps. Show the stamps Penny buys.
Answer:

Do you understand?
Question.
How can you show a story problem with counters?
Answer:

Independent Practice

Use counters to model the problem. Then draw a picture to show your counters.
Question 3.
Quan makes 9 paper hats. Show the paper hats Quan makes.
Answer:

$Math Grade 1 Answer key 1.6 Problem Solving 1$

Question 4.
Ami sees 6 birds. Show the birds Ami sees.
Answer:

Question 5.
Ann has 12 books. Show the books Ann has.
Answer:

Problem Solving

Solve the problems below.
Question 6.
Jake puts 7 pencils on the table. Show the pencils Jake puts on the table. Use counters to model the problem. Then draw a picture to show your counters.
Answer:

Question 7.
There are 4 frogs in the pond. Which shows the number of frogs?
$Envision Math Grade 1 Answers Topic 1.6 Use Objects 3$
Answer:

Question 8.
Journal Write a story with the number 5. Ask a friend to draw a picture to show the problem.
________________________
________________________
Answer:

Envision Math Grade 1 Answer Key Topic 1.2 6 to 10

September 2, 2024

Envision Math 1st Grade Textbook Answer Key Topic 1.2 6 to 10

6 to 10

Home Connection Your child showed numbers from 6 through 10 using counters and a five-frame.
Home Activity Gather ten small objects. Say a number and have your child show it with objects.
Question 1.
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 1$
Answer:

Question 2.
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 1$
Answer:

Question 3.
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 1$
Answer:

Question 4.
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 1$
Answer:

$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 2$

Guided Practice

Write the number that tells how many.
Question 1.
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 3$
Answer:

Question 2.
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 4$
Answer:

Question 3.
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 5$
Answer:

$Math 1st Grade Textbook Answer Key Topic 1.2 6 to 10 1$

Question 4.
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 6$
Answer:

Do you understand?
Question.
6 is 5 and 1 more. What is 7?
Answer:

Independent Practice

Write the number that tells how many.
Question 5.
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 7$
Answer:

Question 6.
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 8$
Answer:

Question 7.
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 9$
Answer:

Question 8.
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 10$
Answer:

Number Sense
Question 9.
Draw more counters to make 7. $Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 11$
Answer:

Problem Solving

Solve the problems below. 6 to 106 to 10
Question 10.
Kara found 5 shells. Then she found 3 more. How many shells did Kara find? Draw a picture. Write the number.
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 12$
Answer:

Question 11.
Sal saw 5 cars. Then he saw 4 more. How many cars did Sal see?
$Envision Math 1st Grade Answer Key Topic 1.2 6 to 10 13$
Answer:

Question 12.
Journal What are 6 foods you like best? Draw and label them.
Answer:

$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies$

enVision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20: Use Strategies

September 2, 2024

Go through the enVision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20: Use Strategies regularly and improve your accuracy in solving questions.

enVision Math Common Core 1st Grade Answers Key Topic 3 Addition Facts to 20: Use Strategies

$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 1$
Envision STEM Project: What Do They Eat?
Find Out Talk to friends and relatives about the things different animals eat. Ask how their teeth help them survive and meet their needs.

Journal: Make a Book Show what you found out. In your book, also:

Draw pictures of animals and what they eat.
Make up and solve addition problems about animals and what they eat.

Answer :
Carnivores are animals that eat meat. They have canines, which are sharp teeth used to tear meat.
Herbivores are animals that only eat plants. They have molars that are strong, flat, and perfect for grinding up plant matter.
Animals which eat plants are :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Envision-STEM-Project$
Animals which eat meat are :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Envision-STEM-Project2$
Number of herbivore animals in the above figure = 9
Number of Carnivore animals in the above figure = 14
Total Number of Animals = 14 + 9 = 23 animals .

Review What You Know

Vocabulary

Question 1.
Circle the problem that
shows a double.
5 + 5 = 10
5 + 4 = 9
5 + 3 = 8
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Review-What-You-Know-Vocabulary-Question-1$
Explanation :
When both the addends are equal then sum is double the addend .

Question 2.
Circle the word that tells which strategy can be used to add the numbers.
7 + 8 = ?
doubles
near doubles
count back
Answer:
7 + 8 = 15 .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Review-What-You-Know-Vocabulary-Question-2$
Explanation :
Doubles plus 1 is a strategy used to add two consecutive numbers that is, when they are next to each other. We simply add the smaller number twice or double it and then, add 1 to it, to get the final result. Here consecutive numbers 7 and 8 have been added using the doubles plus one strategy
7 + 7 + 1 = 14 + 1 = 15 which is near to doubles .

Question 3.
Circle the sum in the problem below.
7 + 4 = 11
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Review-What-You-Know-Vocabulary-Question-3$
Explanation :
11 is the sum
7 and 4 are addends .

Addition and Subtraction

Question 4.
Robin has 3 stamps. Joe gives her 4 stamps. How many stamps does Robin have now?
___ stamps
Answer:
Number of Stamps with Robin = 3 Stamps
Number of Stamps Joe gave to Robin = 4 Stamps
Total Number of Stamps Robin have now = 3 + 4 = 7 Stamps .

Question 5.
Jen has 8 cat treats. She feeds some treats to her cat. Jen has 4 treats left. How many treats did Jen feed her cat?
___ treats
Number of Cat treats with Jen = 8 treats
Number of treats left with Jen now = 4 treats
Total Number of treats fed to her cats = 8 – 4 = 4 treats .

Doubles Facts

Question 6.
Solve this doubles fact.
3 + 3 = ___
Answer:
3 + 3 = 6
Explanation :
When both the addends are equal then sum is double the addend .

Pick a Project

PROJECT 3A
Can you see the gecko? Project: Create an Animal Model
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.1$

Answer :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Project-3A$
Explanation :
The above image contains the Animal Model of Dinosaur and Cat .
Cut the paper into given shapes and fold them we get the given shapes .

PROJECT 3B
Would you like to live on a boat? Project: Make a Sailboat Model
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.2$
Answer :

$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Project-3B$
This are the different models of sail boats .

PROJECT 3C
What is your favorite ride? Project: Make a Poster about Roller Coasters
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.3$
Answer :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Project-3C$

3-ACT MATH PREVIEW

Math Modeling
Go for a Spin

Before watching the video, think: What was the last game you played? What kind of game was it? Video games, board games, and card games all have something in common. They need someone to test that the game is fun to play, and that it is fair.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.4$
Answer :
The last game which I played was Block puzzle . it is a puzzle game helps in building the blocks and clearing them . It is a mobile Game.

Lesson 3.1 Count On to Add

Solve & Share

Abby has 5 cubes. Salina gives her 7 more cubes. How many cubes does Abby have now? Show your thinking.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.5$

Visual Learning Bridge
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.6$

Convince Me!
How do you know where to start counting on? How do you know how many to count on?
Answer:
Whatever may be the order of the addends but the sum does not change .
in the below figure we notice 5 + 7 = 12 and 7 + 5 = 12
The order of the addends 5 and 7 is interchanged and but the sum is the same .
that means order of addends doesn’t change the sum .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Solve-&-Share$
Explanation :
Order property of addition refers to two sets of addition in which numbers interchange or switch their places the answer remain the same. That means if the numbers are same and if you add any number first answer remains the same. For addition you can change the places of numbers.

Guided Practice

Use the number line to count on. Write each sum.

Question 1.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.7$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Guided-Practice-Question-1$
Explanation :
Find 9 on number line. Then count on 7 more to add 9 + 7 = 16
Start at 9 and make 7 jumps . You land on 16 .

Question 2.
9 + 9 = ____
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.8$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Guided-Practice-Question-2$

Explanation :
Find 9 on number line. Then count on 9 more to add 9 + 9 = 18
Start at 9 and make 9 jumps . You land on 18 .

Independent Practice

Use a number line. Count on to find each sum.

Question 3.
7 + 4 = ___
Answer:
7 + 4 = 11
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Independent-Practice-Question-3$
Explanation :
Find 7 on number line. Then count on 4 more to add 7 + 4 = 11
Start at 7 and make 4 jumps . You land on 11 .

Question 4.
6 + 8 =
Answer:
6 + 8 = 14
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Independent-Practice-Question-4$
Explanation :
Find 6 on number line. Then count on 8 more to add 6 + 8 = 14
Start at 6 and make 8 jumps . You land on 14 .

Question 5.
9 + 4 = ____
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Independent-Practice-Question-5$
Explanation :
Find 9 on number line. Then count on 94more to add 9 + 4 = 13
Start at 9 and make 4 jumps . You land on 13.

Question 6.
9 + 6 = ___
Answer:
9 + 6 = 15
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Independent-Practice-Question-6$
Explanation :
Find 9 on number line. Then count on 9 more to add 9 + 6 = 15
Start at 9 and make 6 jumps . You land on 15 .

Question 7.
7 + 7 = ___
Answer:
7 + 7 = 14
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Independent-Practice-Question-7$
Explanation :
Find 7 on number line. Then count on 4 more to add 7 + 7 = 14
Start at 7 and make 7 jumps . You land on 14 .

Question 8.
9 + 8 = ___
Answer:
9 + 8 = 17
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Independent-Practice-Question-8$
Explanation :
Find 9 on number line. Then count on 8 more to add 9 + 8 = 17
Start at 9 and make 8 jumps . You land on 17 .

Question 9.
6 + 4 = ___
Answer :
6 + 4 = 10
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Independent-Practice-Question-9$
Explanation :
Find 6 on number line. Then count on 4 more to add 6 + 4 = 10
Start at 6 and make 4 jumps . You land on 10 .

Question 10.
8 + 5 = ___
Answer:
8 + 5 = 13
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Independent-Practice-Question-10$
Explanation :
Find 8 on number line. Then count on 5 more to add 8 + 5 = 13
Start at 8 and make 5 jumps . You land on 13 .

Question 11.
3 + 9 = ___
Answer :
3 + 9 = 12
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Independent-Practice-Question-11$
Explanation :
Find 3 on number line. Then count on 9 more to add 3 + 9 = 12
Start at 3 and make 9 jumps . You land on 12 .

$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 12.1$
Solve. Use a number line to count on.

Question 12.
envision® STEM
Kim works at a zoo. She feeds the big cats 9 pounds of meat. She feeds the tortoises 7 pounds of leaves and berries.
How many pounds of food does Kim feed the animals?
___ pounds of food
Answer:
Quantity of food fed to big cats = 9 pounds
Quantity of food fed to tortoises = 7 pounds
Total Quantity of food fed to Animals = 9 + 7 = 16 pounds .
Explanation :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Guided-Practice-Question-12$
Explanation :
Find 9 on number line. Then count on 7 more to add 9 + 7 = 16
Start at 9 and make 7 jumps . You land on 16 .

Problem Solving

Solve the problems below. Use a number line.

Question 13.
Reasoning
Scott walks 6 blocks. Then he walks 3 more blocks. Write the numbers that will help find out how many blocks Scott walked in all.
Start at ___. Count on ___ more.
6 + 3 = ___
Answer:
Number of Blocks Scott walk = 6
Number of more blocks he walk = 3
Total Number of blocks Scott walk = 6 + 3 = 9 blocks .
Explanation :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Problem-Solving-Question-13$
Find 6 on number line. Then count on 4 more to add 6 + 3 = 9
Start at 6 and make 3 jumps . You land on 9 .

Question 14.
Reasoning
Ramona mails 3 letters. Then she mails 8 more letters. Write the numbers that will help find out how many letters Ramona mailed in all.
Start at ____. Count on ___ more.
3 + 8 = ___
Answer :
Number of mails Ramona mails = 3
Number of more mails Ramona mails = 8
Total Number of mails Ramona mails = 3 + 8 = 11 letters
Explanation :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Problem-Solving-Question-14$
Find 3 on number line. Then count on 8 more to add 3 + 8 = 11
Start at 3 and make 8 jumps . You land on 11 .

Question 15.
Higher Order Thinking
Write and solve an addition story problem.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.10$
Answer:
Samy has 3 balls . His Brother Gaurish gave 9 more balls to him . How many balls Samy have now ?
Explanation :
Number of balls with Samy = 3
Number of Balls gaurish give to samy = 9
Total Number of balls samy have now = 3 + 9 = 12 balls .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Problem-Solving-Question-15$
Find 3 on number line. Then count on 9 more to add 3 + 9 = 12
Start at 3 and make 9 jumps . You land on 12 .

Question 16.
Assessment Practice
Solve 5 + 9 = ? on the number line. Show your work.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.11$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.1-Count-On-to-Add-Problem-Solving-Question-16$
Find 5 on number line. Then count on 9 more to add 5 + 9 = 14
Start at 5 and make 9 jumps . You land on 14 .

Lesson 3.2 Count On to Add Using an Open Number Line

Solve & Share

Arnie runs 6 miles on Thursday. He runs 5 more miles on Friday. How many miles did Arnie run in all? Use the number line to show how you know.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.12$

Visual Learning Bridge
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.13$

Convince Me!
What number is always included on an open number line when you add?
Answer:
The number which is included always on the number line is the addend 6 .
Number of miles Arnie ran on Thursday = 6 miles .
Number of miles miles ran on Friday = 5 miles .
Total Number of Miles ran by Arnie = 6 + 5 = 11 miles
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.2-Count-On-to-Add-Using-an-Open-Number-Line-Solve-&-Share$

Guided Practice
Use the open number line to solve. Practice Show your work.

Question 1.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.14$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.2-Count-On-to-Add-Using-an-Open-Number-Line-Guided-Practice-Question-1$
Explanation :
You can also break apart adding 3 and 2 is one way to add 5 more .

Question 2.
6 + 2 = ___
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.15$
Answer:

$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.2-Count-On-to-Add-Using-an-Open-Number-Line-Guided-Practice-Question-2$
Explanation :
Counting on by 1 is one way to add 2 more .
Start at 6 and Then count on 2 more .You land on 8 which is the sum .

Independent Practice

Find each sum. Use the open number line to show your work.

Question 3.
4 + 7 = ___
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.16$
Answer:
4 + 7 = 11
4 + 4 + 3 = 11
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.2-Count-On-to-Add-Using-an-Open-Number-Line-Independent-Practice-Question-3$
Explanation :
You can also break apart adding 4 and 3 is one way to add 11 more .

Question 4.
8 + 8 = ___
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.17$
Answer:
8 + 8 = 16
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.2-Count-On-to-Add-Using-an-Open-Number-Line-Independent-Practice-Question-4$

Explanation :
You can also break apart adding 4 and 4 is one way to add 8 more .

Question 5.
6 + 6 = ___
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.18$
Answer:
6 + 6 = 12
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.2-Count-On-to-Add-Using-an-Open-Number-Line-Independent-Practice-Question-5$
Explanation :
You can also break apart adding 3 and 3 is one way to add 6 more .

Question 6.
9 + 7 = ___
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.19$
Answer:
9 + 7 = 16
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.2-Count-On-to-Add-Using-an-Open-Number-Line-Independent-Practice-Question-6$
Explanation :
You can also break apart adding 4 and 3 is one way to add 7 more .

Question 7.
Vocabulary
Solve the problem.
Show your work on the open number line below.
8 + 6 = ___
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.20$
Answer:
8 + 6 = 14
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.2-Count-On-to-Add-Using-an-Open-Number-Line-Independent-Practice-Question-7$
Explanation :
You can also break apart adding 2 and 4 is one way to add 6 more .
The sums after adding the addends are included on the number line .

Problem Solving

Solve each problem. Choose a tool to help. Solving Write an equation to match.

Question 8.
Use Tools
Marco rides his bike 7 miles. Then he rides 9 more miles. How many miles did Marco ride in all?
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.21$
__ miles
Answer:
Number of miles Marco rides = 7 miles .
Number of more miles he rides = 9 miles .
Total Number of miles Marco rides = 7 + 9 = 16 miles .
Therefore, Macro rides 16 miles in all .

Question 9.
Use Tools
Ana reads 10 books in January. She reads 10 books in February. How many books did Ana read in all?
___ books
Answer:
Number of Books Read by Ana in January = 10 books
Number of Books Read by Ana in February = 10 books
Total Number of Books read in all by Anna = 10 + 10 = 20 books .
Therefore, Anna reads 20 books in all .

Question 10.
Higher Order Thinking
Kate has 8 roses. She picks some more roses. Now Kate has 17 roses. How many roses did Kate pick? Use words or pictures to explain how you know.
Answer:
Number of roses with Kate = 8
Number of Roses picked = x
Number of Roses with Kate now = 17
Number of Roses picked = 8 + x = 17 .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.2-Count-On-to-Add-Using-an-Open-Number-Line-Independent-Practice-Question-10$
Here number of jumps represent number of roses picked.
Here it starts at 8 and lands at 17 that means 9 jumps are required to land at 17 so 9 roses are picked .

Question 11.
Assessment Practice
Find the sum. Show your work on the open number line below.
9 + 6 = ___
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.22$
Answer:
9 + 6 = 15
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.2-Count-On-to-Add-Using-an-Open-Number-Line-Independent-Practice-Question-11$
Explanation :
You can also break apart adding 3 and 3 is one way to add 6 more .

Lesson 3.3 Doubles

Solve & Share

Carlos and Alisa each have the same number of books. They each have more than 5 books. How many books do they have in all? Show your thinking below.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.23$

Visual Learning Bridge
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.24$

Convince Me!
Becca shows 6 + 7 with cubes and says it is not a doubles fact. Is she correct? How do you know?

Guided Practice

Decide if the cubes show a doubles fact. Circle your answer. Then write an equation to match the cubes.

Question 1.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.25$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Guided-Practice-Question-1$
Explanation :
Double Fact means To get a double of a number, we add the same number to itself. but here 5 and 6 are two different numbers . So, it is not a Double Fact .

Question 2.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.26$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Guided-Practice-Question-2$
Explanation :
Double Fact means To get a double of a number, we add the same number to itself. Here 4 is added to itself so, it is a double fact .

Independent Practice

Decide if each set of cubes shows a doubles fact. Circle your answer. Write an equation to match the cubes.

Question 3.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.27$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Independent-Practice-Question-3$
Explanation :
Double Fact means To get a double of a number, we add the same number to itself. Here 6 is added to itself so, it is a double fact .

Question 4.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.28$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Independent-Practice-Question-4$
Explanation :
Double Fact means To get a double of a number, we add the same number to itself. but here 8 and 9 are two different numbers . So, it is not a Double Fact .

Question 5.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.29$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Independent-Practice-Question-5$
Explanation :
Double Fact means To get a double of a number, we add the same number to itself. Here 7 is added to itself so, it is a double fact .

Question 6.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.30$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Independent-Practice-Question-6$
Explanation :
Double Fact means To get a double of a number, we add the same number to itself. Here 10 is added to itself so, it is a double fact .

$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.31$

Question 7.
0 + 0 = $Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.32$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Independent-Practice-Question-7$
Explanation :
Any number added to 0 gives the number itself .

Question 8.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.32$ = 9 + 9
Answer:
18 = 9 + 9
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Independent-Practice-Question-8$
Explanation :
Double Fact means To get a double of a number, we add the same number to itself. Here 9 is added to itself so, it is a double fact .

Question 9.
8 + 8 = $Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.32$
Answer:
8 + 8 = 16
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Independent-Practice-Question-9$
Explanation :
Double Fact means To get a double of a number, we add the same number to itself. Here 8 is added to itself so, it is a double fact .

Question 10.
5 + 5 = $Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.32$
Answer:
5 + 5 = 10
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Independent-Practice-Question-10$
Explanation :
Double Fact means To get a double of a number, we add the same number to itself. Here 5 is added to itself so, it is a double fact .

Problem Solving
Draw cubes to help you solve each number story. Then write an equation to match the problem.

Question 11.
Make Sense
Andrew and his sister each pick 10 flowers. How many flowers did they pick in all?
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.33$
____ flowers
Answer:
Number of Flowers picked by Andrew = 10 flowers
Number of Flowers picked by Andrew sister = 10 flowers
Total Number of flowers picked = 10 + 10 = 20 flowers
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Problem-Solving-Question-11$

Question 12.
Make Sense
Pearl and Charlie each buy 5 books. How many books did they buy in all?
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.34$
___ books
Answer:
Number of Books Pearl bought = 5 books
Number of Books Charlie bought = 5 books
Total Number of books bought in all = 5 + 5 = 10 books .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Problem-Solving-Question-12$

Question 13.
Higher Order Thinking
A hockey team plays 2 games. The team scores the same number of goals in each game. The team scores 12 goals in all. How many goals did the team score in each game?
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.35$
___ goals in each game
Answer:
Total Score in 2 games = 12 .
Number of games = 2
Score of two games is same so Team score = 12 = 6 + 6
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Problem-Solving-Question-13$

Question 14.
Assessment Practice
Which equations show a doubles fact? Choose two that apply.
$Envision Math Common Core Grade 1 Answer Key Topic 3 Addition Facts to 20 Use Strategies 2.36$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.3-Doubles-Problem-Solving-Question-14$
Explanation :
Double Fact means To get a double of a number, we add the same number to itself.

Lesson 3.4 Doubles Plus

Solve & Share

Carlos and I each pick 5 strawberries. What doubles fact shows how many strawberries we have in all? If I pick I more strawberry, how could you find how many strawberries in all?

$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.37$

Visual Learning Bridge
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.38$

Convince Me!
How does knowing 7 + 7 help you find 7 + 8?
Answer :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies- Lesson-3.4-Doubles-Plus-Solve-&-Share$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 8 is one more than 7. So, we can write 8 as 7 + 1.
We already know the double of 7 is 14.
So, the required sum is one more than double. That is 15. Therefore, 7 + 8 = 15.

Guided Practice
Add the doubles. Then use the doubles facts to help you solve the doubles-plus facts.

Question 1.
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.39$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies- Lesson-3.4-Doubles-Plus-Guided-Practice-Question-1$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 7 is two more than 5. So, we can write 7 as 5 + 2.
We already know the double of 5 is 10.
So, the required sum is two more than double. That is 12. Therefore, 5 + 7 = 12.

Question 2.
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.40$
___ + ____ = ___
So, 8 + 9 = ___.
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies- Lesson-3.4-Doubles-Plus-Guided-Practice-Question-2$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 9 is one more than 8. So, we can write 9 as 8 + 1.
We already know the double of 8 is 16.
So, the required sum is one more than double. That is 17. Therefore, 8 + 9 = 17.

Independent Practice

Add the doubles. Then use the double facts to help you solve the doubles-plus facts.

Question 3.
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.41$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies- Lesson-3.4-Doubles-Plus-Guided-Practice-Question-3$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 8 is one more than 7. So, we can write 8 as 7 + 1.
We already know the double of 7 is 14.
So, the required sum is one more than double. That is 15. Therefore, 8 + 7 = 15.

Question 4.
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.42$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies- Lesson-3.4-Doubles-Plus-Guided-Practice-Question-4$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 6 is two more than 4. So, we can write 6 as 4 + 2.
We already know the double of 4 is 8.
So, the required sum is two more than double. That is 10. Therefore, 4 + 6 = 10.

Question 5.
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.43$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies- Lesson-3.4-Doubles-Plus-Guided-Practice-Question-5$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 6 is one more than 5. So, we can write 6 as 5 + 1.
We already know the double of 5 is 10
So, the required sum is one more than double. That is 11. Therefore, 5 + 6 = 11

Question 6.
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.44$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies- Lesson-3.4-Doubles-Plus-Guided-Practice-Question-6$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 10 is one more than 9. So, we can write 10 as 9 + 1.
We already know the double of 9 is 18.
So, the required sum is one more than double. That is 19. Therefore, 9 + 10 = 19.

Question 7.
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.45$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies- Lesson-3.4-Doubles-Plus-Guided-Practice-Question-7$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 7 is one more than 6. So, we can write 7 as 6 + 1.
We already know the double of 6 is 12.
So, the required sum is one more than double. That is 13. Therefore, 6 + 7 = 13

Question 8.
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.46$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies- Lesson-3.4-Doubles-Plus-Guided-Practice-Question-8$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 9 is two more than 7. So, we can write 9 as 7 + 2.
We already know the double of 7 is 14.
So, the required sum is two more than double. That is 16. Therefore, 9 + 7 = 16.

Use a doubles-plus fact to write an equation for the problem. Then draw a picture to match the equation.

Question 9.
Higher Order Thinking
Max has some blue marbles. Tom has some red marbles. Tom has 2 more marbles than Max. How many marbles do they have in all?
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.47$
Answer:
Number of blue marbles with Max = 5 ( taken )
Tom has 2 more marbles than Max So,
Number of Red marbles with tom = 5 + 2 = 7
Total Marble in all = 5 + 7 = 12 .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies- Lesson-3.4-Doubles-Plus-Guided-Practice-Question-9$

Problem Solving

Solve each problem below. Then write an equation to match the problem.

Question 10.
Reasoning
Carrie and Pete each pick 7 cherries. Then Pete picks more. How many cherries do they have in all?
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.48$
Answer:
Number of cherries Carrie pick = 7 cherries
Number of Cherries Pete pick = 7 cherries .
Pete picks more that means more than 7 Pete picks the cherries so, take Pete picks 2 more .
Number of cherries Pete picks = 7 + 2 = 9 cherries.
Total Number of cherries in all = 7 + 9 = 16 cherries .
Therefore, Total Number of cherries in all = 16 cherries .

Question 11.
Reasoning
Manny and Pam each buy 5 apples. Then Pam buys 2 more. How many apples do they have in all?
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.49$
Answer:
Number of Apples bought by Manny = 5 apples
Number of apples Pam bought = 5 apples
Number of apples bought by pam later = 2 apples .
Total Number of apples with pam = 5 + 2 = 7 apples .
Total Number of apples in all = 5 + 7 = 5 + 5 + 2 = 10 + 2 = 12 apples .
Therefore, Total Number of apples in all = 12 apples .

Question 12.
Higher Order Thinking
Laura has to solve 9 + 8. Explain how she could use 8 + 8 to find the sum.
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies- Lesson-3.4-Doubles-Plus-Guided-Practice-Question-12$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 9 is one more than 8. So, we can write 9 as 8 + 1.
We already know the double of 8 is 16.
So, the required sum is one more than double. That is 17. Therefore, 9 + 8 = 17.

Question 13.
Assessment Practice
Use a doubles fact to help you find the missing addend.
8 + __ = 17
A. 8
B. 9
C. 7
D. 1
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.50$
Answer:
The Missing Addend is 9 option – B
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies- Lesson-3.4-Doubles-Plus-Guided-Practice-Question-13$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 9 is one more than 8. So, we can write 9 as 8 + 1.
We already know the double of 8 is 16.
So, the required sum is one more than double. That is 17. Therefore, 8 + 9 = 17.

Lesson 3.5 Make 10 to Add

Solve & Share

Andy says that he can find 9 + 5 by starting with 9 + 1 = 10. What do you think about Andy’s way? Show your work and explain.

$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 2.51$

Visual Learning Bridge
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.2$

Convince Me!
How would you make 10 to find the sum of 9 + 4?
Answer :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.5-Make-10-to-Add-Convince-Me$

Guided Practice
Draw counters to make 10. Then write the sums.

Question 1.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.3$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.5-Make-10-to-Add-Guided-Practice-Question-1$
Explanation :
Make 10 to add
we have 7 counters in 7 so 3 counters are left to make it 10 .
So, move 3 counters from 6 to join 7.
now, we have 10 and 3 .
Therefore 10 + 3 = 13 and 7 + 6 = 13 both are same .

Question 2.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.4$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.5-Make-10-to-Add-Guided-Practice-Question-2$
Explanation :
Make 10 to add
we have 8 counters in 8 so 2 counters are left to make it 10 .
So, move 2 counters from 6 to join 8 .
now, we have 10 and 4 .
Therefore 10 + 4 = 14 and 8 + 6 = 14 both are same .

Independent Practice

Draw counters to make 10. Then write the sums.

Question 3.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.5$

Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.5-Make-10-to-Add-Independent-Practice-Question-3$
Explanation :
Make 10 to add
we have 7 counters in 7 so 3 counters are left to make it 10 .
So, move 3 counters from 8 to join 7 .
now, we have 10 and 5 .
Therefore 10 + 5 = 15 and 7 + 8 = 15 both are same .

Question 4.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.6$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.5-Make-10-to-Add-Independent-Practice-Question-4$
Explanation :
Make 10 to add
we have 9 counters in 9 so 1 counter is left to make it 10 .
So, move 1 counters from 6 to join 9 .
now, we have 10 and 5 .
Therefore 10 + 5 = 15 and 9 + 6 = 15 both are same .

Question 5.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.7$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.5-Make-10-to-Add-Independent-Practice-Question-5$
Explanation :
Make 10 to add
we have 7 counters in 7 so 3 counters are left to make it 10 .
So, move 3 counters from 7 to join 7 .
now, we have 10 and 4 .
Therefore 10 + 4 = 14 and 7 + 7 = 14 both are same .

$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.8$

Question 6.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.9$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.5-Make-10-to-Add-Independent-Practice-Question-6$
Explanation :
Make 10 to add
we have 6 counters in 6 so 4 counters are left to make it 10 .
So, move 4 counters from 5 to join 6 .
now, we have 10 and 1 .
Therefore 10 + 1 = 11 and 6 + 5 = 11 both are same .

Question 7.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.10$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.5-Make-10-to-Add-Independent-Practice-Question-7$
Explanation :
Make 10 to add
we have 4 counters in 4 so 6 counters are left to make it 10 .
So, move 6 counters from 8 to join 4 .
now, we have 10 and 2 .
Therefore 10 + 2 = 12 and 4 + 8 = 12 both are same .

Question 8.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.11$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.5-Make-10-to-Add-Independent-Practice-Question-8$
Explanation :
Make 10 to add
we have 9 counters in 9 so 1 counter is left to make it 10 .
So, move 1 counters from 5 to join 9 .
now, we have 10 and 4 .
Therefore 10 + 4 = 14 and 9 + 5 = 14 both are same .

Problem Solving
Draw counters to help you solve each problem below. Use 2 different colors.

Question 9.
Model
Carlos sees 7 yellow birds in a tree. Then he sees 6 white birds. How many birds does Carlos see in all?
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.12$
__ birds
Answer:
Number of Yellow Birds seen by Carlos = 7
Number of White birds seen by Carlos = 6
Total Number of Birds seen by Carlos = 7 + 6 = 10 + 3 = 13 .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.5-Make-10-to-Add-Problem solving-Question-9$

Question 10.
Model
Emily picks 8 red flowers. Then she picks 8 yellow flowers. How many flowers does Emily pick in all?
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.13$
___ flowers
Answer:
Number of red flowers Emily have = 8
Number of yellow flowers Emily have = 8
Total number of flowers Emily have in all = 8 + 8 = 10 + 6 = 16 flowers .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.5-Make-10-to-Add-Problem solving-Question-10$

Question 11.
Higher Order Thinking
Look at the model. Complete the equations to match what the model shows.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.14$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.5-Make-10-to-Add-Independent-Practice-Question-11$
Explanation :
we have 9 counters in 9 and one counter is moved from 6 to join 9 to make it 10 ,
so we have 10 and 5 = 15 is the sum.
so, 9+ 6 = 15 .

Question 12.
Assessment Practice
Which number belongs in the $Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.15$ ?
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.16$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.5-Make-10-to-Add-Independent-Practice-Question-12$
Explanation :
10 + 1 = 11
a. 6 + 16 = 22
b. 6 + 11 = 17
c. 6 + 6 = 12
d. 6 + 5 = 11 .
so, to get 11 we have to add 5 to 6 .
Therefore, option d is right .

Lesson 3.6 Continue to Make 10 to Add

Solve & Share

How can you make 10 to solve 8 + 5? Show your work and explain.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.17$
Answer :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.6-Continue-to-Make-10-to-Add-Solve-&-Share$
Explanation :
Make 10 to add
we have 8 counters in 8 so 2 counters are left to make it 10 .
So, move 2 counters from 5 to join 8 .
now, we have 10 and 3 .
Therefore 10 + 3 = 13 and 8 + 5 = 13 both are same .

Visual Learning Bridge
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.18$

Convince Me!
How can you make 10 to find the sum of 7 + 6?
Answer :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.6-Continue-to-Make-10-to-Add-Convince-Me$

Guided Practice

Make 10 find the sum. Use the number line to help you.

Question 1.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.19$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.6-Continue-to-Make-10-to-Add-Guided-Practice-Question-1$
Explanation :
Make 10 to add
You can think 8 + 6 as 8 + 2 + 4 , because 6 = 2 + 4
mark an arrow from 8 to 10 and from 10 to 14 on the number line is marked.

Independent Practice

Make 10 to find each sum. Use a number line to help you.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.20$

Question 2.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.21$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.6-Continue-to-Make-10-to-Add-Independent-Practice-Question-2$
Explanation :
Make 10 to add
You can think 7 + 8 as 7 + 3 + 5 , because 8 = 3 + 5
To make 7 as 10 add 3 and then add 5 to the 10
and the same is represented on number line as shown in above figure .

Question 3.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.22$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.6-Continue-to-Make-10-to-Add-Independent-Practice-Question-3$ Explanation :
Make 10 to add
You can think 4 + 9 as 4 + 6 + 3 , because 9 = 6 + 3
To make 4 as 10 add 6 and then add 3 to the 10
and the same is represented on number line as shown in above figure .

Question 4.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.23$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.6-Continue-to-Make-10-to-Add-Independent-Practice-Question-4$
Explanation :
Make 10 to add
You can think 8 + 4 as 8 + 2 + 2 , because 4 = 2 + 2
To make 8 as 10 add 2 and then add 2 to the 10
and the same is represented on number line as shown in above figure .

Question 5.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.24$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.6-Continue-to-Make-10-to-Add-Independent-Practice-Question-5$
Explanation :
Make 10 to add
You can think 9 + 7 as 9 + 1 + 6 , because 7 = 1 + 6
To make 9 as 10 add 1 and then add 6 to the 10
and the same is represented on number line as shown in above figure .

Question 6.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.25$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.6-Continue-to-Make-10-to-Add-Independent-Practice-Question-6$
Explanation :
Make 10 to add
You can think 6 + 7 as 6 + 4 + 3 , because 7 = 4 + 3
To make 6 as 10 add 4 and then add 3 to the 10
and the same is represented on number line as shown in above figure .

Question 7.
Number Sense
Jon adds 8 + 5. First, he adds 8 + 2 to make 10. What should he do next?
Answer:
8 + 5 = 8 + 2 + 3 = 10 + 3 = 13.
Explanation :
5 is written as 2 + 3 because to make 8 we need 2 so in it divided in such a way that 8 can be made 10 nad then next divided part is added to 10 .
8 + 2 + 3 = 10 + 3 = 13.

Problem Solving

Make 10 to help you solve each number story.

Question 8.
Look for Patterns
Conrad has 8 apples. Sam gives him 4 more. How many apples does Conrad have now? Use the open number line to show your work.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.26$
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 3.27$
Conrad has ___ apples.
Answer:
Number of apples with Conrad = 8 apples .
Number of apples Sam gave to Conrad = 4 apples
Total Apples with Conrad = 8 + 4 = 12 apples .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.6-Continue-to-Make-10-to-Add-Problem-Solving-Question-8$
Explanation :
Make 10 to add
You can think 8 + 4 as 8 + 2 + 2 , because 4 = 2 + 2
To make 8 as 10 add 2 and then add 2 to the 10
and the same is represented on number line as shown in above figure .

Question 9.
Higher Order Thinking
Pat makes 10 to solve 7 + 5 by changing the problem to 7 + 3 + 2. How does Pat make 10?
Answer:
7+ 5 = 7 + 3 + 2 = 10 + 2 = 12 .
Explanation :
5 is written as 3+ 2
then add 7 + 3+ 2 = first add 7 + 3 we get 10 then later add 2 to 10 we get 12 as sum .

Question 10.
Assessment Practice
Which shows how to make 10 to add 9 + 6?
A. 9 + 4 + 2
B. 9 + 3 + 3
C. 9 + 1 + 5
D. 9 + 0 + 6
Answer:
Option C.
Explanation :
9 + 6
9 needs only 1 to make 10 so 6 is written as 1 + 5
9 + 1 + 5 = 10 + 5 = 15 .

Lesson 3.7 Explain Addition Strategies

Solve & Share

8 + 6 = ?
Choose a strategy to solve the problem. Use words, objects, or pictures to explain your work.
$Envision Math Common Core 1st Grade Answers Topic 3 Addition Facts to 20 Use Strategies 2.37$
Answer :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Solve-&-Share$
Explanation :
Make 10 to add
we have 8 counters in 8 so 2 counters are left to make it 10 .
So, move 2 counters from 6 to join 8 .
now, we have 10 and 4 .
Therefore 10 + 4 = 14 and 8 + 6 = 14 both are same .

Visual Learning Bridge
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 7.2$

Convince Me!
What strategy could you use to solve 7 + 8? Why is it a good strategy?
Answer :
Near Doubles .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Convince-Me$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 8 is one more than 7. So, we can write 8 as 7 + 1.
We already know the double of 7 is 14.
So, the required sum is one more than double. That is 15. Therefore, 7 + 8 = 15.

Guided Practice
Find each sum. Choose a strategy to use.

Question 1.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 7.3$
Answer:
Doubles Fact Strategy
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Guided-Practice-Question-1$
Explanation :
Double Fact means To get a double of a number, we add the same number to itself. Here 6 is added to itself so, it is a double fact .

Question 2.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 7.4$
Answer:
Make 10 Strategy
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Guided-Practice-Question-2$
Explanation :
Make 10 to add
You can think 9 + 7 as 9 + 1 + 6 , because 7 = 1 + 6
To make 9 as 10 add 1 and then add 6 to the 10
and the same is represented on number line as shown in above figure .

Question 3.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 7.5$
Answer:
Near Doubles or Double Plus and Make 10 strategy Both Strategies can be used .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Guided-Practice-Question-3$
Explanation :
Double Plus:
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 7 is one more than 6. So, we can write 7 as 6
Make 10:
Make 10 to add
You can think 6 + 7 as 6 + 4 + 3 , because 7 = 4 + 3
To make 6 as 10 add 4 and then add 3 to the 10
and the same is represented on number line as shown in above figure .

Question 4.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 7.6$
Answer:
8 + 9 = 17 .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Guided-Practice-Question-4$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 9 is one more than 8. So, we can write 9 as 8 + 1.
We already know the double of 8 is 16.
So, the required sum is one more than double. That is 17. Therefore, 8 + 9 = 17.

Independent Practice

Find each sum.

Question 5.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 7.7$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Independent-Practice-Question-5$
Explanation :
Make 10 to add
You can think 6 + 8 as 6 + 4 + 4 , because 8 = 4 + 4
To make 6 as 10 add 4 and then add 4 to the 10
and the same is represented on number line as shown in above figure .

Question 6.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 7.71$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Independent-Practice-Question-6$
Explanation :
Make 10 to add
You can think 4 + 9 as 4 + 6 + 3 , because 9 = 6 + 3
To make 4 as 10 add 6 and then add 3 to the 10
and the same is represented on number line as shown in above figure .

Question 7.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 7.72$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Independent-Practice-Question-7$
Explanation :
Make 10 to add
we have 7 counters in 7 so 3 counters are left to make it 10 .
So, move 3 counters from 6 to join 7.
now, we have 10 and 3 .
Therefore 10 + 3 = 13 and 7 + 6 = 13 both are same .

Question 8.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 7.8$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Independent-Practice-Question-8$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 9 is one more than 8. So, we can write 9 as 8 + 1.
We already know the double of 8 is 16.
So, the required sum is one more than double. That is 17. Therefore, 9 + 8 = 17.

Question 9.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 7.9$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Independent-Practice-Question-9$
Explanation :
Make 10 to add
we have 8 counters in 8 so 2 counters are left to make it 10 .
So, move 2 counters from 5 to join 8 .
now, we have 10 and 3 .
Therefore 10 + 3 = 13 and 8 + 5 = 13 both are same .

Question 10.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 7.10$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Independent-Practice-Question-10$
Explanation :
Make 10 to add
we have 7 counters in 7 so 3 counters are left to make it 10 .
So, move 3 counters from 4 to join 7.
now, we have 10 and 1 .
Therefore 10 + 1 = 11 and 7 + 4 = 11 both are same .

$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 7.11$

Question 11.
Algebra
Jan has 9 green marbles and some red marbles. She has 11 marbles in all.
9 + ___ = 11
Jan has ___ red marbles.
Answer :
Number of Green Marbles = 9
Number of Red marbles = x
Total Number of Marbles = 11
Number of Red marbles = Total Marbles – Number of Green Marbles = 11 – 9 = 2 Marbles .

Problem Solving

Solve each problem below.

Question 12.
Make Sense
Brett has 8 shirts in his closet. He puts more shirts in the dresser. Brett has 16 shirts in all. How many shirts did Brett put in the dresser?
___ shirts in the dresser
Answer:
Total umber of Shirts = 16 .
Number of Shirts in Closet = 8
Number of more shirts added in the dresser = 16 – 8 = 8 Shirts .

Question 13.
Higher Order Thinking
Manuel and Jake have 13 pencils in all. How many pencils could each boy have?
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 8.1$
Answer:
Total Number of Pencils = 13
Number of Pencils Manuel have = 7 ( taken )
Number of Pencils Jake have = total Pencils – Number of pencils with Manuel .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Problem-Solving-Question-13$
Explanation :
Make 10 to add
we have 7 counters in 7 so 3 counters are left to make it 10 .
So, move 3 counters from 6 to join 7.
now, we have 10 and 3 .
Therefore 10 + 3 = 13 and 7 + 6 = 13 both are same .

Question 14.
Assessment Practice
Which strategies could help you find 7 + 8?
Choose three that apply.
$Envision Math Common Core Grade 1 Answers Topic 3 Addition Facts to 20 Use Strategies 8.2$
Answer:

$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.7-Explain-Addition-Strategies-Problem-Solving-Question-14$

Lesson 3.8 Solve Addition Word Problems with Facts to 20

Solve & Share

Caleb has 4 more stickers than Zoe. Zoe has 5 stickers. How many stickers does Caleb have? Use objects, drawings, or an equation to show your thinking.

$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 8.3$
Answer :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.8-Solve-Addition-Word-Problems-with-Facts-to-20-Solve-&-Share$
Number of stickers with Zoe = 5
Number of stickers with Celeb = 4 more than Zoe = 4 + 5 = 9 stickers .

Visual Learning Bridge
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 8.4$

Convince Me!
Could you find out how many books Seth read by drawing a picture? Explain.
Answer :
Yes , number of books read by Seth = 12 books.
Explanation :
Number of books read by Tanya = 5
comparison between Tanya and Seth is given unknown term can be calculated .
Number of books Seth read = Seth reads 7 books more than Tanya so, 5 + 7 = 12 books .
Therefore, Total Number of books read by Seth = 12 books .

Guided Practice
Solve each problem. Use counters or draw a picture. Then write an equation.

Question 1.
Tim writes 9 stories. He writes 3 fewer stories than Daisy. How many stories did Daisy write?
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 8.5$
Answer:
Number of Stories Tim writes = 9
Number of stories Daisy write = 3 more than Tim = 9 + 3 = 12 stories .
Therefore, Number of stories Daisy write = 12 stories .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.8-Solve-Addition-Word-Problems-with-Facts-to-20-Guided-Practice-Question-1$

Question 2.
Sherry reads 6 comic books. Dally reads 5 more comic books than Sherry. How many comic books did Dally read?
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 8.6$
Answer:
Number of comic books Sherry reads = 6 books
Number of comic books Dally read = 5 more comic books than Sherry = 6 + 5 = 11 books .
Therefore, Number of comic books Dally read = 11 books .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.8-Solve-Addition-Word-Problems-with-Facts-to-20-Guided-Practice-Question-2$

Independent Practice

Solve the problems with objects, drawings, or an equation. Show your work.

Question 3.
Tracy buys 10 buttons on Monday. She buys more buttons on Tuesday. Now she has 19 buttons. How many buttons did Tracy buy on Tuesday?
______ buttons
Answer:
Number of buttons bought on Monday = 10 buttons
Total Number of buttons = 19
Number of buttons bought on Tuesday = total buttons – buttons bought on Monday = 19 – 10 = 9 buttons .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.8-Solve-Addition-Word-Problems-with-Facts-to-20-Guided-Practice-Question-3$

Question 4.
Jen has 9 coins. Jen has 6 fewer coins than Owen. How many coins does Owen have?
___ coins
Answer:
Number of coins with Jen = 9
Jen has 6 fewer coins than Owen that means Owen has 6 coins more than Jen .
Number of coins with Own = 9 + 6 = 15 coins .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.8-Solve-Addition-Word-Problems-with-Facts-to-20-Guided-Practice-Question-4$

Question 5.
14 cans are on the table. 5 cans are big and the rest are small. How many small cans are on the table?
___ small cans
Answer:
Number of cans on the table = 14
Number of big cans = 5
Number of small cans = Total Cans – Big cans = 14 – 5 = 9 .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.8-Solve-Addition-Word-Problems-with-Facts-to-20-Guided-Practice-Question-5$

Problem Solving
Solve each problem below.

Question 6.
Model
Leland cuts out 12 flowers. How many can he color red and how many can he color yellow? Draw a picture and write an equation to help solve the problem.
___ red flowers ____ yellow flowers
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 8.7$
Answer:
Total Number of flowers = 12
Number of red flowers taken = 6
Then
Number of yellow flowers = 12 – 6 = 6 flowers .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.8-Solve-Addition-Word-Problems-with-Facts-to-20-Guided-Practice-Question-5$

Question 7.
Higher Order Thinking
Nicole scored 8 goals this season. She scored 9 fewer goals than Julien. How many goals did Julien score? Write this problem using the word more.
Nicole scored 8 goals this season. Julien scored ________
Answer:
Number of goals scored by Nicole = 8 goals
Nicole scored 9 fewer goals than Julien that means Julien scored 9 goals than Nicole
Number of goals by Julien = 8 + 9 = 17 goals .

Question 8.
Assessment Practice
Dan drinks 6 more glasses of water than Becky. Becky drinks 5 glasses of water. How many glasses of water did Dan drink?
A. 6 – 5 = 1 glass of water
B. 6 + 5 = 11 glasses of water
C. 11 + 6 = 17 glasses of water
D. 11 – 6 = 5 glasses of water
Answer:
Option B .
Explanation :
Number of glasses of water drank by Becky = 5
Dan drinks 6 more glasses of water than Becky
Number of glasses of water drank by Dan = 6 + 5 = 11 glasses .

Lesson 3.9 Critique Reasoning

Solve & Share

A pet store has 9 frogs. 5 of the frogs are green and the rest are brown. Lidia adds 5 + 9 and says that the store has 14 brown frogs.
Circle if you agree or do not agree with Lidia. Use pictures, words, or equations to explain.

$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.1$
Answer :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.9-Critique-Reasoning-Solve-&-Share$
Explanation:
Lidia should subtract green frogs from the total number of frogs then only number of brown frogs can be known but Lidia did addition which is wrong so, i disagree with Lidia .
Therefore, Number of brown frogs = total frogs – green frogs = 9 – 5 = 4 brown frogs .

Visual Learning Bridge
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.2$

Convince Me!
What question would you ask Joe to have him explain his thinking?
Answer :
Visualize thinking helps to understand the concept clearly .

Guided Practice
Circle your answer. Use pictures, Practice words, or equations to explain.

Question 1.
9 cats chase a ball. Some cats stop to eat. Now 4 cats are chasing the ball. Stan says 13 cats stop to eat because 9 + 4 = 13. Do you agree or not agree with Stan?
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.3$
Answer:
Total Number of cats chase a ball = 9
Number of cats chase a ball now = 4
Number of cats stop to eat = 9 = 5 + 4
Therefore, Number of cats stop to eat = 5 cats .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.9-Critique-Reasoning-Guided-Practice-Question-1$

Independent Practice

Circle your answer. Use pictures, words, or equations to explain.

Question 2.
14 grapes sit in a bowl. 9 are green. The rest are purple. How many are purple? Steve says 6 grapes are purple because 9 + 6 = 14. Do you agree or not agree with Steve?
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.4$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.9-Critique-Reasoning-Independent-Practice-Question-2$
Explanation :
Total Grapes = 14
Number of green grapes = 9
Number of purple grapes = 9 + 5 = 14 .
So, Purple grapes are 5 .
But Steve said 9 + 6 = 14 it is wrong as 9 + 6 = 15 .
Therefore I disagree what Steve said .

Question 3.
11 oranges are in a bag. 8 oranges fall out. How many oranges are left in the bag? Maria says 3 oranges are left because 11 – 8 = 3. Do you agree or not agree with Maria?
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.5$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.9-Critique-Reasoning-Independent-Practice-Question-3$
Explanation :
Number of Oranges in bag = 11
Number of Oranges out off bag = 8
8 + 3 = 11 so, Number of oranges in bag = 3
Therefore, Number of oranges in bag = 3 oranges .

Problem Solving

Performance Task

Flower Vases Jill has 15 roses. She wants to put some in a red vase and some in a blue vase.
Help Jill solve the problem. Answer the items below to check Jill’s thinking. Use pictures, words, or equations to explain.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.6$

Question 4.
Explain Jill says she can put an equal number of roses in each vase. She says she can write a doubles fact to match the flowers in the blue and red vases. Do you agree? Explain.
Answer:
I Disagree
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Lesson-3.9-Critique-Reasoning-Independent-Practice-Question-4$
Explanation :
Total Number of Flowers = 15
Put the flowers in blue vase and red vase equally
Number of Flowers in blue vase = 7
Number of Flowers in red vase = 7
Total Flowers in blue vase and red vase = 7 + 7 = 14
1 Flower is left .
So, i disagree flowers cant be divided equally to put in both vases as 1 lower is left .

Question 5.
Model How could Jill use words or drawings to show the problem?
Answer:
It is explained in the above sum image .

Topic 3 Fluency Practice Activity

Find a partner . Get paper and a pencil. Each partner chooses a different color: light blue or dark blue. Partner 1 and Partner 2 each point to a black number at the same time. Both partners add those numbers. If the answer is on your color, draw a tally mark. Work until one partner draws twelve tally marks.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.7$
Answer:

Topic 3 Vocabulary Review

Understand Vocabulary

Question 1.
Circle True or False.
10 + 5 = 15 is a doubles-plus fact.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.8$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Vocabulary-Review-Understand-Vocabulary$
False
Explanation :
Double Plus:
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 10 is five more than 5.

Question 2.
Circle True or False.
In the equation below, 8 is the whole.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.9$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Vocabulary-Review-Understand-Vocabulary-Question-2$
Explanation :
10 and 8 are the addends and 18 is the sum of the equation .

Question 3.
Show how to make 10 to add 8 + 6.
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Vocabulary-Review-Understand-Vocabulary-Question-3$
Explanation :
Make 10 to add
we have 8 counters in 8 so 2 counters are left to make it 10 .
So, move 2 counters from 6 to join 8 .
now, we have 10 and 4 .
Therefore 10 + 4 = 14 and 8 + 6 = 14 both are same .

Question 4.
Write a doubles-plus fact.
Answer:
8 + 9 = 17 .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Vocabulary-Review-Understand-Vocabulary-Question-4$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 9 is one more than 8. So, we can write 9 as 8 + 1.
We already know the double of 8 is 16.
So, the required sum is one more than double. That is 17. Therefore, 8 + 9 = 17.

Question 5.
Show 15 on the open number line.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.10$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Vocabulary-Review-Understand-Vocabulary-Question-5$

Use Vocabulary in Writing

Question 6.
What strategy could help you solve 7 + 8 = ? Use at least one term from the Word List.
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Vocabulary-Review-Use-Vocabulary-in-Writing-Question-6$
Explanation :
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 8 is one more than 7. So, we can write 8 as 7 + 1.
We already know the double of 7 is 14.
So, the required sum is one more than double. That is 15. Therefore, 7 + 8 = 15.

Topic 3 Reteaching

Set A

You can use a number line to add. Start counting at one addend. Count on the number of the other addend.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.11$
Answer:
10 + 8 = 18 .

Use a number line. Count on to find the sum.

Question 1.
7 + 6 = ___
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.12$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Reteaching-Set-A-Question-1$
Explanation :
Find 7 on number line. Then count on 4 more to add 7 + 6 = 13
Start at 7 and make 6 jumps . You land on 13 .

Set B

An open number line can help you add.
7 + 5 = ?
Start with the first addend.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.13$
You can count on by 1s to add 5 more.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.14$
Answer:
7 + 5 = 12
Explanation :
From 7 on number line. count on 5 more 1s to add 7 + 5 = 12
Started at 7 and 5 jumps are made and lands on 12 .
12 is the sum ..

Use an open number line to solve the problem. Show your work.

Question 2.
4 + 9 = ___
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.15$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Reteaching-Set-B-Question-2$
Explanation :
Start at 4 .
Count on by 1s to add 9 more and lands on 13 which is the sum .

Set C

A doubles-plus fact is a doubles fact and 1 or 2 more.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.16$
7 + 7 = 14
14 and 1 more is 15.

Add the doubles. Then use the doubles facts to help you solve the double-plus facts.

Question 3.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.17$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Reteaching-Set-C-Question-3$
Explanation :
Double Plus:
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 6 is one more than 5. So, we can write 6 as 5 + 1

Question 4.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.18$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Reteaching-Set-C-Question-4$
Explanation :
Double Plus:
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 9 is one more than 8. So, we can write 9 as 8 + 1

Question 5
.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.19$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Reteaching-Set-C-Question-5$
Explanation :
Double Plus:
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 8 is two more than 6. So, we can write 8 as 6 + 2

Question 6.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.20$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Reteaching-Set-C-Question-6$
Explanation :
Double Plus:
The addition of any two consecutive numbers can be done by using doubles plus 1 or doubles minus 1 strategy.
The number 7 is two more than 5. So, we can write 7 as 5 + 2

Set D

You can make 10 to add.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.21$

Make 10 to add. Draw counters in the ten-frame to help you.

Question 7.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.22$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Reteaching-Set-D-Question-7$
Explanation :
Make 10 to add
we have 7 counters in 7 so 3 counters are left to make it 10 .
So, move 3 counters from 8 to join 7 .
now, we have 10 and 5 .
Therefore 10 + 5 = 15 and 7 + 8 = 15 both are same .

Topic 3 Reteaching

Set E

You can choose different ways to add.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.23$

Find each sum. Circle the strategy that you used.

Question 8.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.24$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Reteaching-Set-E-Question-8$
Explanation :
Make 10 to add
You can think 8 + 4 as 8 + 2 + 2 , because 4 = 2 + 2
To make 8 as 10 add 2 and then add 2 to the 10
and the same is represented on number line as shown in above figure .

Question 9.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.25$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Reteaching-Set-E-Question-9$
Explanation :
Make 10 to add
we have 7 counters in 7 so 3 counters are left to make it 10 .
So, move 3 counters from 8 to join 7 .
now, we have 10 and 5 .
Therefore 10 + 5 = 15 and 7 + 8 = 15 both are same .

Set F

You can write an equation to help you solve addition problems. Sean plays in 8 soccer matches. Karla plays in 3 more matches than Sean. In how many matches does Karla play?
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.26$
Answer:
Number of soccer matches played by Sean = 8 matches .
Number of soccer matches played by Karla = 3 more matches than Sean = 3 + 8 = 11 matches .
Therefore, Number of soccer matches played by Karla = 11 matches .

Write an equation to solve the problem.

Question 10.
Leslie has 8 pencils. She has 9 fewer pencils than Grace. How many pencils does Grace have?
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.27$
Grace has ___ pencils.
Answer :
Number of Pencils with Leslie = 8 pencils
Leslie have 9 fewer pencils than Grace that means grace have 9 more pencils than Leslie .
Number of pencils with Grace = 8 + 9 = 17 pencils .
Therefore , Grace has 17 pencils.

Set G

$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.28$
What questions can I ask to understand other people’s thinking? Are there mistakes in other people’s thinking? Can I improve on other people’s thinking?
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.29$

Circle your answer. Use pictures, words, or equations to explain.

Question 11.
6 books are on a shelf. Maya puts more books on the shelf. Now 15 books are on the shelf. How many books did Maya put on the shelf?
Kyle says that Maya put 9 books put on the shelf because 6 + 9 = 15. Do you agree or not agree with Kyle?
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 9.30$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Reteaching-Set-G-Question-11$
Explanation :
Total Number of books = 15
Number of books on shelf = 6
Number of boos kept on shelf by Maya = ?
6 + ? = 15 .
6 + 9 = 15 .
Adding 9 to 6 we get 15 so, Number of books kept on shelf by Maya = 9 books .

Topic 3 Assessment Practice

Question 1.
Frank has 7 paper airplanes. He makes 9 more. How many paper airplanes does Frank make in all?
A. 18
B. 17
C. 16
D. 15
Answer:
Option D .
Explanation :
Number of paper airplanes made By Frank = 7
Number of more paper airplanes are made = 9
Total Number of airplanes = 7 + 9 = 16 airplanes .

Question 2.
Mark has 7 red marbles. He has 8 blue marbles. Which shows two ways to find how many marbles Mark has in all?
A. 7 + 8 = 14 and 8 + 7 = 14
B. 7 + 8 = 15 and 8 + 7 = 15
C. 7 + 7 = 14 and 8 + 8 = 14
D. 7 + 7 = 16 and 8 + 8 = 16
Answer:
Option B 7 + 8 = 15 and 8 + 7 = 15
Explanation :
Number of Red marbles = 7
Number of blue marbles = 8
Total Number of marbles with Mark = 7 + 8 or 8 + 7 = 15

Question 3.
Use the open number line. Show how to count on to find 7 + 9. Then write the sum.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 10.1$
7 + 9 = ____
Answer :
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Assessment-Practice-Question-3$
Explanation :
Find 7 on number line. Then count on 9 more to add 7 + 9 = 16
Start at 7 and make 9 jumps . You land on 16 .

Question 4.
Which are doubles facts? Choose two that apply.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 10.2$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Assessment-Practice-Question-4$
Explanation :
Double Fact means To get a double of a number, we add the same number to itself. but here option 3 and 4 are Double facts numbers . where 7 is added to itself in option 3 and in option 4 10 is added to itself .

Question 5.
8 birds are in a tree. 9 more birds join them. How many birds are in the tree now? Write an equation to solve the problem.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 10.3$
Answer:
Number of birds on tree = 8
Number of more birds joined = 9
Total Number of birds on tree now = 8 + 9 = 17 birds .

Question 6.
Gloria has 7 yellow pencils. She has 9 red pencils. How many pencils does Gloria have in all? Explain.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 10.4$
A. 15 pencils; Doubling 7 gives 14, and I more is 15.
B. 19 pencils; Doubling 9 gives 18, and I more is 19.
C. 16 pencils; 7 + 3 = 10, and 6 more is 16.
D. 17 pencils; 7 + 2 = 10, and 7 more is 17.
Answer:
Option C. 16 pencils; 7 + 3 = 10, and 6 more is 16.
Explanation :
Number of Yellow pencils = 7
Number of Red pencils = 9
Total Number of pencils = 7 + 9 = 7 + 3 + 6 = 10 + 6 = 16 pencils .

Make 10 to add
You can think 7 + 9 as 7 + 3 + 6 , because 9 = 3 + 6

Question 7.
Nina bakes 8 corn muffins on Tuesday. She bakes 8 corn muffins on Wednesday. How many corn muffins does Nina bake in all? Which number line shows the problem?
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 10.5$
Answer:
Option C
Explanation :
Number of corn muffins baked on Tuesday = 8
Number of corn muffins baked on Wednesday = 8
Total Number of corn muffins baked = 8 + 8 = 16 muffins .

Find 8 on number line. Then count on 8 more to add 8 + 8 = 16
Start at 8 and make 8 jumps . You land on 16 .

Question 8.
Sandy makes 9 bracelets. Then she makes 5 more bracelets. How many bracelets does Sandy have now?
Use words or pictures to explain.
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Assessment-Practice-Question-8$
Explanation :
Number of Bracelets made by sandy = 9
Number of more bracelets done = 5
Total Number of Bracelets = 9 + 5 = 14 bracelets .

Question 9.
Find 8 + 5. Make a 10 to add.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 10.6$
A. 11
B. 13
C. 15
D. 17
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Assessment-Practice-Question-9$
Explanation :
Make 10 to add
we have 8 counters in 8 so 2 counters are left to make it 10 .
So, move 2 counters from 5 to join 8 .
now, we have 10 and 3 .
Therefore 10 + 3 = 13 and 8 + 5 = 13 both are same .

Question 10.
Maria has 8 more scarves than Lucy. Lucy has 8 scarves. How many scarves does Maria have? Write an equation to solve.
___ + ___ = ___
___ scarves
Answer:
Number of Scarves Lucy have = 8
Number of Scarves Maria have = 8 more scarves than Lucy = 8 + 8 = 16 Scarves .
Therefore, Number of Scarves Maria have = 16 Scarves .

Question 11.
There are 19 limes on the table. 10 fall to the floor. Nicky says there are 9 limes left on the table.
Do you agree or not agree with Nicky’s thinking? Use pictures, words, or an equation to explain.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 10.6$
Answer:
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Assessment-Practice-Question-11$
Explanation :
Total Number of limes = 19
Number of limes fall on floor = 10
Number of Limes left on table = 9 as 19 = 10 + 9
I agree with the Nicky thinking as, there are 9 limes on the table .

Topic 3 Performance Task

Roger’s Reading Record
Roger loves to read!
The chart shows how many books he read for six months.
$Envision Math Common Core 1st Grade Answer Key Topic 3 Addition Facts to 20 Use Strategies 10.7$

Question 1.
How many books did Roger read in all in April and June? Write an equation to solve.
___ + ___ = ___
___ books
Answer:
Number of Books read in April = 8
Number of Books read in June = 8
Total number of books read in April and June = 8 + 8 = 16 books .

Question 2.
Roger read 4 more books in July than he did in January. How many books did he read in July? Draw a picture to solve. Then write an equation to match.
___ +__ = ___
He read ____ books in July.
Answer:
Number of books read in January = 9
Number of books read in July = 4 more books than January = 9 + 4 = 13 books .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Performance-Task-Question-2$

Question 3.
In February, Tracy and Roger read 15 books in all. How many books did Tracy read in February? Explain the strategy that you used to solve the problem.
Answer:
Number of books read by Tracy and Roger = 15 books
Number of books read by Roger in February = 7 books .
Number of books read by Tracy in February = 7 + ? = 15
if we add 8 to 7 then only we get 15
Therefore , Number of books read by Tracy in February = 8 books .

Question 4.
Sharon read 8 books in March. She said that she read 2 fewer books than Roger in March. Do you agree or not agree with Sharon? Circle your answer. Use pictures, words, or equations to explain.

Answer:
Number of books read by Roger in March = 6 books .
Number of books read by Sharon in March = 8 books .
Sharon have more books than Roger
therefore, I disagree what Sharon said .
$Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-3-Addition-Facts-to-20-Use-Strategies-Topic-3-Performance-Task-Question-4$

Category: Envision Math

Envision Math 5th Grade Textbook Answer Key Topic 1.3 Decimal Place Value

Envision Math 5th Grade Textbook Answer Key Topic 1.2 Comparing and Ordering Whole Numbers

Envision Math 6th Grade Textbook Answer Key Topic 2.1 Using Variables to Write Expressions

Envision Math 6th Grade Textbook Answer Key Topic 1.6 Problem Solving

Envision Math 6th Grade Textbook Answer Key Topic 1.5 Comparing and Ordering Decimals

Envision Math 3rd Grade Textbook Answer Key Topic 2.3 Rounding 4-Digit Numbers

Envision Math 3rd Grade Textbook Answer Key Topic 1.3 Greater Numbers

Envision Math 1st Grade Textbook Answer Key Topic 1.6 Problem Solving

Envision Math 1st Grade Textbook Answer Key Topic 1.2 6 to 10

enVision Math Common Core 1st Grade Answers Key Topic 3 Addition Facts to 20: Use Strategies

Lesson 3.1 Count On to Add

Lesson 3.2 Count On to Add Using an Open Number Line

Lesson 3.3 Doubles

Lesson 3.4 Doubles Plus

Lesson 3.5 Make 10 to Add

Lesson 3.6 Continue to Make 10 to Add

Lesson 3.7 Explain Addition Strategies

Lesson 3.8 Solve Addition Word Problems with Facts to 20

Lesson 3.9 Critique Reasoning

Topic 3 Fluency Practice Activity

Topic 3 Vocabulary Review

Topic 3 Reteaching

Topic 3 Reteaching

Topic 3 Assessment Practice

Topic 3 Performance Task