Review What You Know

Vocabulary
Choose the best term from the box. Question 1.
The number 49 has 4 ? .

Question 2.
The number 490 has 4 ? .

Question 3.
The number 54 has 4 ? .

Place Value

Write each number.
Question 4.
3 tens 5 ones

Question 5.
9 tens

Question 6.
forty-six

Question 7.
ninety-eight

Question 8.
fifty-two

Question 9.
seventy-six

Find the sum or difference
Question 10.
6 + 5

Question 11.
7 + 2

Question 12.
8 + 9

Question 13.
8 – 2

Question 14.
7 – 5

Question 15.
9 – 6

Question 16.
7 + 6

Question 17.
7 + 9

Question 18.
9 – 1

Compare Numbers

Question 19.
Writing to Explain Which is greater, 95 or 59? How do you know?

Question 20.
Write these numbers in order from least to greatest:
14 54 41

Hundreds

How can you read and write a number in the hundreds?
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. Question 2.
600 + 50 + 3

Question 3.
eight hundred seventy-nine

Question 4.
Write 156 in expanded form.

Do you UNDERSTAND?
Question 5.
How does a place-value chart show the value of a number?

Question 6.
When 850 is written in expanded form, why are there only two addends?

Question 7.
How do you know that 37 and 307 do not name the same number?

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. Question 9. Question 10. Question 11.
900 + 80 + 5

Question 12.
400 + 70 + 8

Question 13.
three hundred four

Write each number in expanded form and word form.
Question 14.
707

Question 15.
683

Question 16.
894

Question 17.
520

Question 18.
251

Question 19.
402

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?

Question 21.
Algebra Find the value of the missing number.
389 = ☐ + 80 + 9