Estimating Sums and Differences Worksheets
Round each number, then add or subtract to estimate the answer.
Estimating Sums and Differences
Name:Date:Score:
Estimate: round each number to the nearest 100, then add or subtract the rounded numbers.
- 1599 + 969 ≈
- 2673 − 125 ≈
- 3322 + 530 ≈
- 4770 − 521 ≈
- 5698 + 544 ≈
- 6654 − 324 ≈
- 7917 + 700 ≈
- 8903 − 757 ≈
- 9511 + 866 ≈
- 10592 − 378 ≈
- 11606 + 120 ≈
- 12430 − 356 ≈
Printable Worksheets for Kids · printableworksheetsforkids.pages.dev
Estimating Sums and Differences
Name:Date:Score:
Estimate: round each number to the nearest 100, then add or subtract the rounded numbers.
- 1289 + 193 ≈
- 2682 − 206 ≈
- 3498 + 250 ≈
- 4653 − 618 ≈
- 5656 + 797 ≈
- 6758 − 410 ≈
- 7493 + 968 ≈
- 8815 − 138 ≈
- 9570 + 721 ≈
- 10586 − 480 ≈
- 11148 + 783 ≈
- 12883 − 302 ≈
Printable Worksheets for Kids · printableworksheetsforkids.pages.dev
Estimating Sums and Differences
Name:Date:Score:
Estimate: round each number to the nearest 100, then add or subtract the rounded numbers.
- 1681 + 369 ≈
- 2839 − 667 ≈
- 3491 + 897 ≈
- 4952 − 545 ≈
- 5148 + 725 ≈
- 6520 − 419 ≈
- 7632 + 174 ≈
- 8222 − 135 ≈
- 9382 + 691 ≈
- 10495 − 478 ≈
- 11825 + 613 ≈
- 12836 − 554 ≈
Printable Worksheets for Kids · printableworksheetsforkids.pages.dev
Answer key — Sheet A (12 answers)
- 1. 1,600
- 2. 600
- 3. 800
- 4. 300
- 5. 1,200
- 6. 400
- 7. 1,600
- 8. 100
- 9. 1,400
- 10. 200
- 11. 700
- 12. 0
Answer key — Sheet B (12 answers)
- 1. 500
- 2. 500
- 3. 800
- 4. 100
- 5. 1,500
- 6. 400
- 7. 1,500
- 8. 700
- 9. 1,300
- 10. 100
- 11. 900
- 12. 600
Answer key — Sheet C (12 answers)
- 1. 1,100
- 2. 100
- 3. 1,400
- 4. 500
- 5. 800
- 6. 100
- 7. 800
- 8. 100
- 9. 1,100
- 10. 0
- 11. 1,400
- 12. 200
About this skill
Estimation tells you if an answer is reasonable. These sheets round to the nearest hundred first, then calculate with the rounded numbers.
How to teach it
- Draw a quick number line for each question until the rule is automatic.
- Underline the rounding place, then circle the digit to its right.
- Always do a quick estimate to check a calculation.
Mistakes to watch for
- Changing the digit to the right instead of the digit in the rounding place.
- Forgetting to carry (rounding 396 to the nearest ten gives 400, not 390).
