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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 563 · 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 11.87 to one decimal place. =
  2. 2.Round 22.79 to one decimal place. =
  3. 3.Which is closest to 591 ÷ 21? (a) 300 (b) 30 (c) 15 (d) 60
  4. 4.Which is closest to 1998 ÷ 41? (a) 50 (b) 100 (c) 25 (d) 500
  5. 5.Which is closest to 801 + 599 + 702? (a) 2300 (b) 2000 (c) 2200 (d) 2100
  6. 6.Round 58.33 to one decimal place. =
  7. 7.Round 45801 to the nearest hundred.
  8. 8.Round 47064 to the nearest ten.
  9. 9.Round 81.64 to one decimal place. =
  10. 10.Round 20677 to the nearest ten.
  11. 11.Round 49.79 to one decimal place. =
  12. 12.Which is closest to 3506 ÷ 49? (a) 35 (b) 700 (c) 140 (d) 70
  13. 13.Which is closest to 2407 ÷ 31? (a) 40 (b) 80 (c) 160 (d) 800
  14. 14.Round 52402 to the nearest hundred.
  15. 15.Round 9420 to the nearest hundred.
  16. 16.Round 59871 to the nearest thousand.
  17. 17.Round 35.48 to one decimal place. =
  18. 18.Which is closest to 2696 ÷ 29? (a) 45 (b) 900 (c) 180 (d) 90
  19. 19.Round 94683 to the nearest thousand.
  20. 20.Round 28329 to the nearest ten.
  21. 21.Which is closest to 1208 ÷ 31? (a) 40 (b) 80 (c) 20 (d) 400
  22. 22.Which is closest to 3607 ÷ 41? (a) 900 (b) 45 (c) 90 (d) 180
  23. 23.Which is closest to 203 × 78? (Round each number first.) (a) 32000 (b) 1600 (c) 16000 (d) 160000
  24. 24.Which is closest to 2799 ÷ 39? (a) 140 (b) 70 (c) 35 (d) 700
  25. 25.Round 13555 to the nearest thousand.
  26. 26.Which is closest to 1507 ÷ 51? (a) 300 (b) 30 (c) 60 (d) 15
  27. 27.Which is closest to 806 ÷ 39? (a) 40 (b) 200 (c) 20 (d) 10
  28. 28.Round 11.89 to one decimal place. =
  29. 29.Which is closest to 503 + 195 + 795? (a) 1400 (b) 1600 (c) 1700 (d) 1500
  30. 30.Round 34.34 to one decimal place. =
  31. 31.Which is closest to 2092 ÷ 31? (a) 700 (b) 70 (c) 35 (d) 140
  32. 32.Which is closest to 603 + 499 + 104? (a) 1300 (b) 1100 (c) 1200 (d) 1400
  33. 33.Round 45.46 to one decimal place. =
  34. 34.Which is closest to 1203 ÷ 21? (a) 600 (b) 120 (c) 30 (d) 60
  35. 35.Round 61.44 to one decimal place. =
  36. 36.Which is closest to 594 ÷ 19? (a) 300 (b) 15 (c) 30 (d) 60
  37. 37.Round 12993 to the nearest thousand.
  38. 38.Which is closest to 605 + 497 + 500? (a) 1500 (b) 1600 (c) 1800 (d) 1700
  39. 39.Round 51.78 to one decimal place. =
  40. 40.Which is closest to 606 ÷ 31? (a) 10 (b) 20 (c) 40 (d) 200

Answer key

  1. 11.9
  2. 22.8
  3. 30
  4. 50
  5. 2100
  6. 58.3
  7. 45800
  8. 47060
  9. 81.6
  10. 20680
  11. 49.8
  12. 70
  13. 80
  14. 52400
  15. 9400
  16. 60000
  17. 35.5
  18. 90
  19. 95000
  20. 28330
  21. 40
  22. 90
  23. 16000
  24. 70
  25. 14000
  26. 30
  27. 20
  28. 11.9
  29. 1500
  30. 34.3
  31. 70
  32. 1200
  33. 45.5
  34. 60
  35. 61.4
  36. 30
  37. 13000
  38. 1600
  39. 51.8
  40. 20

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