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Compatible Numbers Worksheet

Practice identifying and using compatible numbers for estimation and mental math in Grade 7.

Grade 7 Math Number SenseCompatible Numbers
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Includes

Fill in the BlanksMultiple Choice2 Short AnswerTrue / FalseCustom

Standards

CCSS.MATH.CONTENT.7.NS.A.3

Topics

mathgrade 7compatible numbersestimationnumber sense
8 sections · Free to use · Printable
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Compatible Numbers Practice

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Compatible numbers are numbers that are easy to compute mentally. They are often used for estimation. Read each question carefully and follow the instructions.

Choose the most compatible number for the operation indicated.

1. For 47 + 23, a compatible number for 47 is   and for 23 is  .

2. For 198 ÷ 5, a compatible number for 198 is  .

3. For 31.2 x 9.8, a compatible number for 31.2 is   and for 9.8 is  .

Estimate the answer using compatible numbers. Choose the best estimate.

4. Estimate: 78 ÷ 4

a

10

b

20

c

30

d

40

5. Estimate: 512 + 289

a

700

b

800

c

900

d

1000

6. Explain how you would use compatible numbers to estimate the product of 24 and 16.

Determine if the statement is True or False.

7. When estimating 365 ÷ 6, 360 is a compatible number for 365.

T

True

F

False

8. A baker needs to make 108 cupcakes for a party. Each box holds 12 cupcakes. Estimate how many boxes the baker needs using compatible numbers.

9. Use compatible numbers to estimate the sum of 145 and 78. Show your estimation on the number line below.

050100150200250