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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 625 · 40 questions
TalentJR

The method (Round, then calculate): Round each number to the nearest ten, hundred or whole number. Do the easy sum with the rounded numbers. Pick the option nearest to it. To round a number, look at the digit after the place you keep: 5 or more goes up, less than 5 stays.

NameDateTime takenScore ___ / 40
  1. 1.Round 14.29 to one decimal place. =
  2. 2.Which is closest to 196 + 605 + 200? (a) 1100 (b) 900 (c) 1200 (d) 1000
  3. 3.Which is closest to 202 × 19? (Round each number first.) (a) 8000 (b) 40000 (c) 4000 (d) 400
  4. 4.Round 81.44 to one decimal place. =
  5. 5.Which is closest to 296 × 29? (Round each number first.) (a) 90000 (b) 900 (c) 9000 (d) 18000
  6. 6.Which is closest to 199 × 58? (Round each number first.) (a) 24000 (b) 1200 (c) 120000 (d) 12000
  7. 7.Round 10061 to the nearest hundred.
  8. 8.Round 43.66 to one decimal place. =
  9. 9.Which is closest to 2802 ÷ 39? (a) 35 (b) 140 (c) 70 (d) 700
  10. 10.Which is closest to 796 × 52? (Round each number first.) (a) 80000 (b) 40000 (c) 400000 (d) 4000
  11. 11.Round 62752 to the nearest ten.
  12. 12.Which is closest to 704 × 31? (Round each number first.) (a) 210000 (b) 2100 (c) 42000 (d) 21000
  13. 13.Round 65171 to the nearest hundred.
  14. 14.Which is closest to 606 ÷ 29? (a) 200 (b) 10 (c) 20 (d) 40
  15. 15.Round 29014 to the nearest hundred.
  16. 16.Which is closest to 199 + 498 + 199? (a) 900 (b) 1100 (c) 800 (d) 1000
  17. 17.Which is closest to 904 + 296 + 297? (a) 1400 (b) 1600 (c) 1500 (d) 1700
  18. 18.Round 65.13 to one decimal place. =
  19. 19.Which is closest to 498 + 201 + 105? (a) 1000 (b) 700 (c) 800 (d) 900
  20. 20.Round 21.66 to one decimal place. =
  21. 21.Which is closest to 1600 ÷ 39? (a) 80 (b) 400 (c) 20 (d) 40
  22. 22.Which is closest to 2009 ÷ 49? (a) 40 (b) 80 (c) 400 (d) 20
  23. 23.Which is closest to 405 ÷ 19? (a) 40 (b) 200 (c) 20 (d) 10
  24. 24.Which is closest to 902 + 405 + 499? (a) 2000 (b) 1900 (c) 1800 (d) 1700
  25. 25.Which is closest to 699 × 60? (Round each number first.) (a) 42000 (b) 4200 (c) 420000 (d) 84000
  26. 26.Which is closest to 3197 ÷ 41? (a) 160 (b) 800 (c) 40 (d) 80
  27. 27.Which is closest to 397 + 200 + 699? (a) 1400 (b) 1500 (c) 1300 (d) 1200
  28. 28.Which is closest to 2393 ÷ 29? (a) 160 (b) 800 (c) 40 (d) 80
  29. 29.Round 27354 to the nearest hundred.
  30. 30.Round 21.86 to one decimal place. =
  31. 31.Which is closest to 594 ÷ 29? (a) 40 (b) 20 (c) 10 (d) 200
  32. 32.Which is closest to 1491 ÷ 49? (a) 15 (b) 300 (c) 30 (d) 60
  33. 33.Round 99.32 to one decimal place. =
  34. 34.Which is closest to 98 + 699 + 195? (a) 1000 (b) 900 (c) 1200 (d) 1100
  35. 35.Round 95168 to the nearest thousand.
  36. 36.Round 48.44 to one decimal place. =
  37. 37.Which is closest to 904 + 599 + 604? (a) 2000 (b) 2200 (c) 2300 (d) 2100
  38. 38.Round 14.49 to one decimal place. =
  39. 39.Which is closest to 802 × 61? (Round each number first.) (a) 480000 (b) 4800 (c) 96000 (d) 48000
  40. 40.Which is closest to 296 × 28? (Round each number first.) (a) 900 (b) 90000 (c) 18000 (d) 9000

Answer key

  1. 14.3
  2. 1000
  3. 4000
  4. 81.4
  5. 9000
  6. 12000
  7. 10100
  8. 43.7
  9. 70
  10. 40000
  11. 62750
  12. 21000
  13. 65200
  14. 20
  15. 29000
  16. 900
  17. 1500
  18. 65.1
  19. 800
  20. 21.7
  21. 40
  22. 40
  23. 20
  24. 1800
  25. 42000
  26. 80
  27. 1300
  28. 80
  29. 27400
  30. 21.9
  31. 20
  32. 30
  33. 99.3
  34. 1000
  35. 95000
  36. 48.4
  37. 2100
  38. 14.5
  39. 48000
  40. 9000

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