Envision Math 5th Grade Textbook Answer Key Topic 2.4 Adding and Subtracting

Adding and Subtracting

How can you add and subtract whole numbers?
What was the total number of motor vehicles made in the United States and Japan in one year?

Choose an Operation
Add to join groups.
Find 11,989,387 + 10,511,518.
Estimate:
12,000,000 + 11,000,000 = 23,000,000
Envision Math 5th Grade Answer Key Topic 2.4 Adding and Subtracting 1

Another Example
How can you subtract across zeros?

Find 5,002 – 2,684. Since addition and subtraction have an inverse relationship, check your subtraction by adding

Step 1
Envision Math 5th Grade Answer Key Topic 2.4 Adding and Subtracting 2

Step 2
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Check
Envision Math 5th Grade Answer Key Topic 2.4 Adding and Subtracting 4

Explain It

Question 1.
Explain the regrouping in Step 1 of the subtraction example above.
Answer:

Question 2.
Why can you check a subtraction problem by adding?
Answer:

Step 1

Line up numbers by place value. Add the ones, tens, and hundreds.
Envision Math 5th Grade Answer Key Topic 2.4 Adding and Subtracting 5

Step 2

Continue adding. Regroup if needed. Insert commas in the sum to separate periods.
Envision Math 5th Grade Answer Key Topic 2.4 Adding and Subtracting 6
The sum is reasonable since the estimate was 23,000,000.
In one year a total of 22,500,905 vehicles were made

Guided Practice*

Do you know HOW?

Add.

Question 1.
5,741 + 31,018
Answer:

Question 2.
7,110 + 499
Answer:

Subtract.

Question 3.
9,234 – 2,387
Answer:

Question 4.
110,652 – 8,600
Answer:

Do you UNDERSTAND?

Question 5.
Writing to Explain In Step 2 of the example above, explain how you regrouped the tens place.
Answer:

Question 6.
In the example above, how many cars did the United States and Germany make altogether?
Answer:

Independent Practice

In 7 through 12, add.

Question 7.
7,469 + 8,374
Answer:

Question 8.
19,335 + 24,281
Answer:

Question 9.
40,742 + 22,597
Answer:

Question 10.
102,369 + 60,320
Answer:

Question 11.
18,269 + 109,347
Answer:

Question 12.
75,977 + 24,683
Answer:

In 13 through 18, subtract. Check your answer by adding.

Question 13.
4,002 – 3,765
Answer:

Question 14.
58,005 – 1,098
Answer:

Question 15.
113,300 – 1,774
Answer:

Question 16.
454,900 – 33,870
Answer:

Question 17.
31,483 – 29,785
Answer:

Question 18.
103,558 – 64,671
Answer:

Question 19.
Reasoning Why should you estimate before you find the sum or difference of large numbers?
Answer:

Question 20.
About 66,150,000 households in the U.S. have cats and about 58,200,000 households have dogs. About how many more households have cats than dogs?
Answer:

Question 21.
Write a Problem Use 1,400 and 986 to write a real-world addition problem.
Answer:

Question 22.
Humans are born with 350 bones. Some of these bones fuse together as humans grow. Adults only have 206 bones. How many more bones does a baby have than an adult?
Envision Math 5th Grade Answer Key Topic 2.4 Adding and Subtracting 60
Answer:

Question 23.
Find each sum and difference. Write >, <, or = for each Envision Math 5th Grade Answer Key Topic 2.4 Adding and Subtracting 50.
a. 1,233 + 486 Envision Math 5th Grade Answer Key Topic 2.4 Adding and Subtracting 50 2,200 – 481
b. 193 + 233 Envision Math 5th Grade Answer Key Topic 2.4 Adding and Subtracting 50 309 + 118
c. 544 + 4,732 Envision Math 5th Grade Answer Key Topic 2.4 Adding and Subtracting 50 2,512 + 1,930
d. 9,491 – 6,230 Envision Math 5th Grade Answer Key Topic 2.4 Adding and Subtracting 50 7,020 – 3,759
The table at the right shows the amount of time (rounded to the nearest hour) that astronauts have spent in space for several space programs.
Answer:

Question 24.
For the five space programs listed, what is the total number of hours astronauts spent in space?
Envision Math Grade 5 Answers Topic 2.4 Adding and Subtracting 61
A. 14,608 hours
B. 17,621 hours
C. 19,988 hours
D. 20,038 hours
Answer:

Question 25.
How much longer did astronauts in the Space Shuttle program spend in space than all of the other programs combined?
A. 631 hours
B. 2,194 hours
C. 4,776 hours
D. 12,407 hours
Answer:

Question 26.
Lisa has a basket of 17 tomatoes. She makes sauce with 9 tomatoes. If Lisa wants to split up the rest between 3 friends and herself, how
many tomatoes does each person get?
Answer:

Question 27.
There are about 44,000 farms in Florida and about 38,000 farms in New York. Are the total number of estimated farms in Florida and
New York greater or less than 100,000?
Answer:

Stop and Practice

Find each sum. Estimate to check if the answer is reasonable.

Question 1.
Envision Math Grade 3 Answer Key Topic 2.4 Adding and Subtracting 62
Answer:

Question 2.
Envision Math Grade 3 Answer Key Topic 2.4 Adding and Subtracting 63
Answer:

Question 3.
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Answer:

Question 4.
Envision Math Grade 3 Answer Key Topic 2.4 Adding and Subtracting 65
Answer:

Question 5.
Envision Math Grade 3 Answer Key Topic 2.4 Adding and Subtracting 66
Answer:

Question 6.
Envision Math Grade 3 Answer Key Topic 2.4 Adding and Subtracting 67
Answer:

Question 7.
Envision Math Grade 3 Answer Key Topic 2.4 Adding and Subtracting 68
Answer:

Question 8.
Envision Math Grade 3 Answer Key Topic 2.4 Adding and Subtracting 69
Answer:

Find each difference. Estimate to check if the answer is reasonable.

Question 9.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 70
Answer:

Question 10.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 71
Answer:

Question 11.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 72
Answer:

Question 12.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 73
Answer:

Question 13.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 74
Answer:

Question 14.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 75
Answer:

Question 15.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 76
Answer;

Question 16.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 77
Answer:

Question 17.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 78
Answer:

Question 18.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 79
Answer:

Error Search Find each sum or difference that is not correct.
Write it correctly and explain the error.

Question 19.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 80
Answer:

Question 20.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 81
Answer:

Question 21.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 82
Answer:

Question 22.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 83
Answer:

Question 23.
Envision Math 5th Grade Textbook Answers Topic 2.4 Adding and Subtracting 84
Answer:

Number Sense

Estimating and Reasoning Write whether each statement is true or false. Explain your reasoning.

Question 24.
The difference of 32,076 and 21,894 is closer to 10,000 than 11,000.
Answer:

Question 25.
The sum of 10,323 and 9,769 is greater than 19,000 but less than 21,000.
Answer:

Question 26.
The sum of 8,242 and 4,031 is less than 12,000.
Answer:

Question 27.
The difference of 6,712 – 3,503 is 3 more than 3,212.
Answer:

Question 28.
The sum of 405 + 319 is 5 more than 719.
Answer:

Question 29.
The difference of 8,764 – 1,843 is greater than 8,000.
Answer:

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