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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 295 · 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 52.83 to one decimal place. =
  2. 2.Round 14451 to the nearest ten.
  3. 3.Which is closest to 400 ÷ 21? (a) 20 (b) 200 (c) 40 (d) 10
  4. 4.Which is closest to 297 × 88? (Round each number first.) (a) 27000 (b) 270000 (c) 54000 (d) 2700
  5. 5.Round 49901 to the nearest thousand.
  6. 6.Round 60.07 to one decimal place. =
  7. 7.Round 31.49 to one decimal place. =
  8. 8.Which is closest to 702 × 80? (Round each number first.) (a) 56000 (b) 560000 (c) 5600 (d) 112000
  9. 9.Which is closest to 504 × 18? (Round each number first.) (a) 20000 (b) 1000 (c) 10000 (d) 100000
  10. 10.Round 57504 to the nearest ten.
  11. 11.Which is closest to 806 ÷ 19? (a) 400 (b) 20 (c) 80 (d) 40
  12. 12.Round 8797 to the nearest hundred.
  13. 13.Which is closest to 297 × 62? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000
  14. 14.Round 29752 to the nearest ten.
  15. 15.Round 76959 to the nearest hundred.
  16. 16.Which is closest to 1996 ÷ 51? (a) 40 (b) 400 (c) 20 (d) 80
  17. 17.Round 50092 to the nearest thousand.
  18. 18.Which is closest to 1595 ÷ 19? (a) 80 (b) 160 (c) 800 (d) 40
  19. 19.Which is closest to 297 × 42? (Round each number first.) (a) 1200 (b) 120000 (c) 24000 (d) 12000
  20. 20.Round 11.89 to one decimal place. =
  21. 21.Which is closest to 599 × 50? (Round each number first.) (a) 30000 (b) 3000 (c) 300000 (d) 60000
  22. 22.Round 30.17 to one decimal place. =
  23. 23.Which is closest to 897 × 19? (Round each number first.) (a) 1800 (b) 180000 (c) 18000 (d) 36000
  24. 24.Which is closest to 102 + 401 + 499? (a) 1200 (b) 1100 (c) 1000 (d) 900
  25. 25.Round 84.86 to one decimal place. =
  26. 26.Round 82047 to the nearest hundred.
  27. 27.Round 58.84 to one decimal place. =
  28. 28.Which is closest to 703 + 197 + 500? (a) 1600 (b) 1500 (c) 1400 (d) 1300
  29. 29.Which is closest to 999 ÷ 51? (a) 200 (b) 20 (c) 10 (d) 40
  30. 30.Which is closest to 395 + 96 + 602? (a) 1100 (b) 1300 (c) 1000 (d) 1200
  31. 31.Which is closest to 904 + 302 + 398? (a) 1800 (b) 1500 (c) 1600 (d) 1700
  32. 32.Which is closest to 197 + 297 + 696? (a) 1400 (b) 1200 (c) 1100 (d) 1300
  33. 33.Which is closest to 299 × 70? (Round each number first.) (a) 2100 (b) 42000 (c) 210000 (d) 21000
  34. 34.Which is closest to 1203 ÷ 41? (a) 60 (b) 300 (c) 30 (d) 15
  35. 35.Round 13.08 to one decimal place. =
  36. 36.Which is closest to 3496 ÷ 49? (a) 70 (b) 700 (c) 35 (d) 140
  37. 37.Which is closest to 403 × 32? (Round each number first.) (a) 1200 (b) 12000 (c) 24000 (d) 120000
  38. 38.Round 76.41 to one decimal place. =
  39. 39.Round 46387 to the nearest thousand.
  40. 40.Round 85.09 to one decimal place. =

Answer key

  1. 52.8
  2. 14450
  3. 20
  4. 27000
  5. 50000
  6. 60.1
  7. 31.5
  8. 56000
  9. 10000
  10. 57500
  11. 40
  12. 8800
  13. 18000
  14. 29750
  15. 77000
  16. 40
  17. 50000
  18. 80
  19. 12000
  20. 11.9
  21. 30000
  22. 30.2
  23. 18000
  24. 1000
  25. 84.9
  26. 82000
  27. 58.8
  28. 1400
  29. 20
  30. 1100
  31. 1600
  32. 1200
  33. 21000
  34. 30
  35. 13.1
  36. 70
  37. 12000
  38. 76.4
  39. 46000
  40. 85.1

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