## Envision Math 3rd Grade Textbook Answer Key Topic 1.1 Hundreds

**Review What You Know**

**Vocabulary**

Choose the best term from the box.

Question 1.

The number 49 has 4 ? .

Answer:

Question 2.

The number 490 has 4 ? .

Answer:

Question 3.

The number 54 has 4 ? .

Answer:

**Place Value**

Write each number.

Question 4.

3 tens 5 ones

Answer:

Question 5.

9 tens

Answer:

Question 6.

forty-six

Answer:

Question 7.

ninety-eight

Answer:

Question 8.

fifty-two

Answer:

Question 9.

seventy-six

Answer:

**Addition and Subtraction**

Find the sum or difference

Question 10.

6 + 5

Answer:

Question 11.

7 + 2

Answer:

Question 12.

8 + 9

Answer:

Question 13.

8 – 2

Answer:

Question 14.

7 – 5

Answer:

Question 15.

9 – 6

Answer:

Question 16.

7 + 6

Answer:

Question 17.

7 + 9

Answer:

Question 18.

9 – 1

Answer:

**Compare Numbers**

Question 19.

Writing to Explain Which is greater, 95 or 59? How do you know?

Answer:

Question 20.

Write these numbers in order from least to greatest:

14 54 41

Answer:

**Hundreds**

How can you read and write a number in the hundreds?

Answer:

All numbers are made from the digits, 0, 1,2, 3, 4, 5, 6, 7, 8, and 9.

**Another Example**

How can you show 850 on a place-value chart?

**Guided Practice**

**Do you know HOW?**

For 1-3, write each number in standard form.

Question 1.

Answer:

Question 2.

600 + 50 + 3

Answer:

Question 3.

eight hundred seventy-nine

Answer:

Question 4.

Write 156 in expanded form.

Answer:

**Do you UNDERSTAND?**

Question 5.

How does a place-value chart show the value of a number?

Answer:

Question 6.

When 850 is written in expanded form, why are there only two addends?

Answer:

Question 7.

How do you know that 37 and 307 do not name the same number?

Answer:

You can show 125 in different ways.

place-value blocks:

standard form: 125

expanded form: 100 + 20 + 5

word form: one hundred twenty-five

**Independent Practice**

Write each number in standard form.

Question 8.

Answer:

Question 9.

Answer:

Question 10.

Answer:

Question 11.

900 + 80 + 5

Answer:

Question 12.

400 + 70 + 8

Answer:

Question 13.

three hundred four

Answer:

Write each number in expanded form and word form.

Question 14.

707

Answer:

Question 15.

683

Answer:

Question 16.

894

Answer:

Question 17.

520

Answer:

Question 18.

251

Answer:

Question 19.

402

Answer:

**Problem Solving**

Question 20.

Reasoning The sum of the digits in a three-digit number is 4. The ones digit is 3. What is the number?

Answer:

Question 21.

Algebra Find the value of the missing number.

389 = ☐ + 80 + 9

Answer:

Question 22.

**Writing to Explain** Which digit has the greatest value in 589?

Answer:

Question 23.

Which is the standard form of 700 + 50?

A. 570

B. 705

C. 750

D. 1,200

Answer: