Estimating Sums Worksheet

Practice estimating sums of whole numbers and decimals to the nearest ten, hundred, or whole number.

Grade 7 Math Number SenseEstimating Sums

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Includes

Fill in the Blanks2 Short AnswerMultiple ChoiceTrue / FalseCustom

Standards

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

Topics

mathgrade 7estimatingsumsnumber sense

8 sections · Free to use · Printable

Estimating Sums

Name:

Date:

Score:

Read each question carefully and follow the instructions to estimate the sums. Show your work where indicated.

Estimate the sum by rounding each number to the nearest ten.

1. 43 + 78 ≈ + =

2. 124 + 59 ≈ + =

3. 367 + 212 ≈ + =

Estimate the sum by rounding each number to the nearest hundred. Show your rounded numbers.

4. 589 + 321

5. 1450 + 760

6. Estimate the sum of 12.7 + 8.3 by rounding each number to the nearest whole number.

Determine if the following statements are True or False.

7. When estimating 245 + 382 to the nearest hundred, the estimated sum is 600.

True

False

8. Sarah bought a book for $14.85 and a pen for $3.20. Estimate the total cost of her purchases to the nearest dollar.

9. Use the number line to help estimate the sum of 18 + 32. Round each number to the nearest ten.

First, round 18 to the nearest ten:

Then, round 32 to the nearest ten:

Estimated sum: