## Envision Math 4th Grade Textbook Answer Key Topic 1.1 Thousands

**Review What You Know**

Question 1.

“Baby,” the snake, weighs 403 pounds. Is it the heaviest snake that is living in captivity? You will find out in Lesson 1-3.

Answer:

Question 2.

How many towns and cities were there in California in 2004? You will find out in Lesson 1-1.

Answer:

**Review What You Know!**

**Vocabulary**

Choose the best term from the box

Question 1.

A group of three digits in a number separated by a comma is a __.

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Question 2.

A __ is a line that shows numbers in order using a scale.

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Question 3.

The number 8 is an ? number.

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Question 4.

The number 5 is an __ number.

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Comparing Numbers

Compare. Use >, <, or = for each .

Question 5.

13 10

Answer:

Question 6.

7 7

Answer:

Question 7.

28 29

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Question 8.

14 5

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Question 9.

43 34

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Question 10.

0 1

Answer:

Question 11.

52 52

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Question 12.

13 65

Question 13.

22 33

**Place Value**

Tell if the underlined digit is in the ones, tens, or hundreds place.

Question 14.

34__6__

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Question 15.

__1__7

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Question 16.

9__2__1

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Question 17.

__1__06

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Question 18.

3__3__

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Question 19.

__4__7

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Question 20.

__2 17__

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Question 21.

__3__20

Question 22.

81__0__

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Question 23.

1,00__6__

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Question 24.

__9__99

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Question 25.

1,4__0__5

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Question 26.

Writing to Explain How does using commas to separate periods help you read large numbers?

**Thousands**

What are some ways to represent numbers in the thousands?

An altimeter measures height above sea level. Jill’s altimeter shows she is 3,241 feet above sea level. There are different ways to represent 3,241.

**Another Example**

How do you read and write numbers in the thousands?

Another bicycle racer’s altimeter shows he is 5,260 feet above sea level. Write 5,260 in standard form, expanded form, and word form.

When writing a number in standard form,

write only the digits: 5,260.

__Each group of 3 digits starting from the right forms a period.__

A number in expanded form __is written as the sum of the value of the digits:__ 5,000 + 200 + 60 + 0.

Use periods in the place-value chart to write

5,260 in word form: five thousand, two hundred sixty.

**Explain It**

Question 1.

Explain why the value of 5 in 5,264 is 5,000.

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Question 2.

Is the expanded form for 5,260 the same as for 5,206?

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You can represent numbers using place-value blocks.

You can represent numbers on a number line.

**Guided Practice***

Do you know HOW?

In 1 through 4, write the word form, and tell the value of the red digit in each number.

Question 1.

15,324

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Question 2.

1 35,467

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Question 3.

921,382

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Question 4.

275,206

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In 5 and 6, write the expanded form.

Question 5.

42,158

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Question 6.

63,308

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Do you UNDERSTAND?

Question 7.

If Jill climbed 100 feet more, what would her altimeter read?

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Question 8.

What is the value of the 2 in 3,261? the 3? the 1?

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Question 9.

Write one hundred one thousand, eleven in standard form.

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**Independent Practice**

Leveled Practice In 10 through 13, write each number in standard form

Question 10.

Answer;

Question 11.

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Question 12.

Answer:

Question 13.

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**Independent Practice**

In 14 and 15, write each number in standard form.

Question 14.

Eighty-three thousand, nine hundred two

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Question 15.

Three hundred twenty-one thousand, two hundred nine

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In 16 and 17, write each number in expanded form.

Question 16.

Four hundred ninety-seven thousand, three hundred thirty-two

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Question 17.

Twenty-one thousand, eight hundred seven

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In 18 and 19, write each number in word form.

Question 18.

300,000 + 8,000 + 20 + 9

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Question 19.

Problem Solving

Question 20.

Reasoning The pedometer below counts the number of steps you walk. It can show 5 digits. What is the greatest number it can show?

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Question 21.

A town library has 124,763 books and 3,142 DVDs. This year, they bought 1,000 books and 2,000 DVDs. How many books does the library have now?

A. 5,142 books

B. 23,142 books

C. 125,763 books

D. 134,763 books

Answer:

Question 22.

Number Sense Which digit is in the same place in all three numbers below? Name the place-value position.

574,632 24,376 204,581

Question 23.

Reasoning What is the greatest 4-digit number you can write? What is the least 4-digit number?

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Question 24.

In 2004, California had 1,080 towns and cities. Use place-value blocks to represent 1,080. If this number increases by 300 in ten years, how many towns and cities will there be in ten years?

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**Mixed Problem Solving**

Question 1.

How many more Kemp Ridley’s Sea Turtles were there in 1947 than in 1968?

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Question 2.

Did the population of Kemp Ridley’s Sea Turtles increase or decrease between 1991 and 2000?

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Question 3.

How many fewer Kemp Ridley’s Sea Turtles were found nesting in 1991 than in 1968?

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Question 4.

Which is taller: the California jewel-flower or the Calistoga popcorn flower?

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Question 5.

Which is shorter: the Calistoga popcorn flower or the Slenderhorned spineflower?

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Question 6.

Order the California jewel-flower, the Sacramento Orcutt grass, and the Slender-horned spineflower from tallest to shortest using

their heights.

For 7 and 8, use the information below.

Question 7.

Which digit in the number 155,959 is in the thousands place? What does the 1 mean in this number?

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Question 8.

Strategy Focus Solve the problem using the strategy Write an Equation. How many square miles of California’s total area is covered by water?

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