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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 957 · 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 70.36 to one decimal place. =
  2. 2.Which is closest to 298 + 596 + 798? (a) 1600 (b) 1700 (c) 1900 (d) 1800
  3. 3.Which is closest to 699 × 60? (Round each number first.) (a) 420000 (b) 84000 (c) 42000 (d) 4200
  4. 4.Round 7551 to the nearest hundred.
  5. 5.Which is closest to 2000 ÷ 49? (a) 400 (b) 40 (c) 80 (d) 20
  6. 6.Which is closest to 599 ÷ 21? (a) 15 (b) 60 (c) 300 (d) 30
  7. 7.Round 56.83 to one decimal place. =
  8. 8.Round 51.81 to one decimal place. =
  9. 9.Which is closest to 97 + 798 + 603? (a) 1700 (b) 1500 (c) 1600 (d) 1400
  10. 10.Round 33426 to the nearest hundred.
  11. 11.Round 43.18 to one decimal place. =
  12. 12.Which is closest to 599 + 704 + 201? (a) 1400 (b) 1700 (c) 1500 (d) 1600
  13. 13.Round 26.89 to one decimal place. =
  14. 14.Which is closest to 1196 ÷ 39? (a) 30 (b) 300 (c) 60 (d) 15
  15. 15.Round 65.51 to one decimal place. =
  16. 16.Round 67326 to the nearest hundred.
  17. 17.Round 87.63 to one decimal place. =
  18. 18.Which is closest to 1591 ÷ 41? (a) 20 (b) 40 (c) 400 (d) 80
  19. 19.Which is closest to 2999 ÷ 49? (a) 30 (b) 600 (c) 120 (d) 60
  20. 20.Which is closest to 1804 ÷ 29? (a) 30 (b) 600 (c) 120 (d) 60
  21. 21.Round 69.51 to one decimal place. =
  22. 22.Round 22.58 to one decimal place. =
  23. 23.Which is closest to 403 + 195 + 197? (a) 900 (b) 700 (c) 800 (d) 1000
  24. 24.Which is closest to 3195 ÷ 39? (a) 40 (b) 80 (c) 800 (d) 160
  25. 25.Round 86.57 to one decimal place. =
  26. 26.Round 64.68 to one decimal place. =
  27. 27.Which is closest to 598 × 92? (Round each number first.) (a) 108000 (b) 540000 (c) 54000 (d) 5400
  28. 28.Which is closest to 203 × 31? (Round each number first.) (a) 60000 (b) 6000 (c) 600 (d) 12000
  29. 29.Round 81.22 to one decimal place. =
  30. 30.Which is closest to 2091 ÷ 31? (a) 70 (b) 140 (c) 35 (d) 700
  31. 31.Which is closest to 2795 ÷ 41? (a) 70 (b) 35 (c) 700 (d) 140
  32. 32.Which is closest to 504 + 95 + 202? (a) 800 (b) 1000 (c) 900 (d) 700
  33. 33.Which is closest to 404 × 42? (Round each number first.) (a) 32000 (b) 160000 (c) 16000 (d) 1600
  34. 34.Which is closest to 699 × 22? (Round each number first.) (a) 140000 (b) 14000 (c) 28000 (d) 1400
  35. 35.Which is closest to 296 × 38? (Round each number first.) (a) 1200 (b) 120000 (c) 24000 (d) 12000
  36. 36.Round 70.13 to one decimal place. =
  37. 37.Which is closest to 297 × 22? (Round each number first.) (a) 600 (b) 6000 (c) 12000 (d) 60000
  38. 38.Which is closest to 195 + 896 + 597? (a) 1800 (b) 1700 (c) 1900 (d) 1600
  39. 39.Which is closest to 1993 ÷ 49? (a) 20 (b) 40 (c) 80 (d) 400
  40. 40.Which is closest to 700 + 904 + 700? (a) 2300 (b) 2200 (c) 2400 (d) 2500

Answer key

  1. 70.4
  2. 1700
  3. 42000
  4. 7600
  5. 40
  6. 30
  7. 56.8
  8. 51.8
  9. 1500
  10. 33400
  11. 43.2
  12. 1500
  13. 26.9
  14. 30
  15. 65.5
  16. 67300
  17. 87.6
  18. 40
  19. 60
  20. 60
  21. 69.5
  22. 22.6
  23. 800
  24. 80
  25. 86.6
  26. 64.7
  27. 54000
  28. 6000
  29. 81.2
  30. 70
  31. 70
  32. 800
  33. 16000
  34. 14000
  35. 12000
  36. 70.1
  37. 6000
  38. 1700
  39. 40
  40. 2300

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