FreeMath
Grade 3easy

Estimation Practice

Practice estimation by rounding for third grade. Rounding before calculating gives quick, reasonable estimates.

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All 20 Practice Problems

Every question in this set. Solve them on paper, or use the interactive tool above for instant feedback and hints.

  1. 1.Estimate 48 + 31 by rounding to tens
  2. 2.Estimate 67 + 24 by rounding to tens
  3. 3.Estimate 93 - 48 by rounding to tens
  4. 4.Estimate 76 - 32 by rounding to tens
  5. 5.Estimate 234 + 156 by rounding to hundreds
  6. 6.Estimate 478 + 312 by rounding to hundreds
  7. 7.Estimate 823 - 456 by rounding to hundreds
  8. 8.Estimate 654 - 287 by rounding to hundreds
  9. 9.Is 52 + 47 closer to 90 or 100?
  10. 10.Is 85 - 38 closer to 40 or 50?
  11. 11.Estimate 28 × 3 by rounding
  12. 12.Estimate 52 × 4 by rounding
  13. 13.Estimate 19 + 22 + 18 by rounding
  14. 14.Is 456 + 378 closer to 800 or 900?
  15. 15.Estimate 98 + 103 by rounding
  16. 16.Estimate 247 - 152 by rounding to hundreds
  17. 17.About how much is 49 + 51?
  18. 18.About how much is 199 + 202?
  19. 19.Estimate 73 × 2 by rounding
  20. 20.Is 312 + 289 closer to 500 or 600?
Show answer key
  1. 1.Estimate 48 + 31 by rounding to tens Answer: 50 + 30 = 80
  2. 2.Estimate 67 + 24 by rounding to tens Answer: 70 + 20 = 90
  3. 3.Estimate 93 - 48 by rounding to tens Answer: 90 - 50 = 40
  4. 4.Estimate 76 - 32 by rounding to tens Answer: 80 - 30 = 50
  5. 5.Estimate 234 + 156 by rounding to hundreds Answer: 200 + 200 = 400
  6. 6.Estimate 478 + 312 by rounding to hundreds Answer: 500 + 300 = 800
  7. 7.Estimate 823 - 456 by rounding to hundreds Answer: 800 - 500 = 300
  8. 8.Estimate 654 - 287 by rounding to hundreds Answer: 700 - 300 = 400
  9. 9.Is 52 + 47 closer to 90 or 100? Answer: 100
  10. 10.Is 85 - 38 closer to 40 or 50? Answer: 50
  11. 11.Estimate 28 × 3 by rounding Answer: 30 × 3 = 90
  12. 12.Estimate 52 × 4 by rounding Answer: 50 × 4 = 200
  13. 13.Estimate 19 + 22 + 18 by rounding Answer: 20 + 20 + 20 = 60
  14. 14.Is 456 + 378 closer to 800 or 900? Answer: 800
  15. 15.Estimate 98 + 103 by rounding Answer: 100 + 100 = 200
  16. 16.Estimate 247 - 152 by rounding to hundreds Answer: 200 - 200 = 0
  17. 17.About how much is 49 + 51? Answer: About 100
  18. 18.About how much is 199 + 202? Answer: About 400
  19. 19.Estimate 73 × 2 by rounding Answer: 70 × 2 = 140
  20. 20.Is 312 + 289 closer to 500 or 600? Answer: 600

About This Practice

This practice set includes 20 estimation problems. Estimation skills help check answers and make quick calculations in everyday life.

Want more practice? See all Grade 3 practice →