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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 965 · 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.Which is closest to 991 ÷ 19? (a) 25 (b) 500 (c) 50 (d) 100
  2. 2.Round 18953 to the nearest thousand.
  3. 3.Round 20.31 to one decimal place. =
  4. 4.Which is closest to 2400 ÷ 29? (a) 160 (b) 40 (c) 800 (d) 80
  5. 5.Round 72.89 to one decimal place. =
  6. 6.Round 75885 to the nearest thousand.
  7. 7.Round 24.93 to one decimal place. =
  8. 8.Which is closest to 297 × 30? (Round each number first.) (a) 90000 (b) 900 (c) 18000 (d) 9000
  9. 9.Which is closest to 1995 ÷ 49? (a) 400 (b) 80 (c) 40 (d) 20
  10. 10.Round 63876 to the nearest thousand.
  11. 11.Round 25723 to the nearest ten.
  12. 12.Round 94861 to the nearest hundred.
  13. 13.Which is closest to 1504 ÷ 49? (a) 15 (b) 300 (c) 30 (d) 60
  14. 14.Round 85.23 to one decimal place. =
  15. 15.Round 49.79 to one decimal place. =
  16. 16.Which is closest to 596 × 89? (Round each number first.) (a) 5400 (b) 540000 (c) 108000 (d) 54000
  17. 17.Which is closest to 99 + 697 + 500? (a) 1500 (b) 1400 (c) 1300 (d) 1200
  18. 18.Which is closest to 602 × 60? (Round each number first.) (a) 3600 (b) 360000 (c) 72000 (d) 36000
  19. 19.Round 45445 to the nearest hundred.
  20. 20.Which is closest to 1207 ÷ 19? (a) 600 (b) 120 (c) 30 (d) 60
  21. 21.Round 13597 to the nearest thousand.
  22. 22.Which is closest to 598 × 70? (Round each number first.) (a) 42000 (b) 84000 (c) 420000 (d) 4200
  23. 23.Round 31239 to the nearest hundred.
  24. 24.Which is closest to 699 × 50? (Round each number first.) (a) 70000 (b) 350000 (c) 3500 (d) 35000
  25. 25.Round 54603 to the nearest ten.
  26. 26.Round 69.26 to one decimal place. =
  27. 27.Which is closest to 2491 ÷ 51? (a) 500 (b) 25 (c) 100 (d) 50
  28. 28.Which is closest to 902 × 92? (Round each number first.) (a) 810000 (b) 8100 (c) 81000 (d) 162000
  29. 29.Round 27.84 to one decimal place. =
  30. 30.Which is closest to 401 + 198 + 97? (a) 600 (b) 700 (c) 800 (d) 900
  31. 31.Round 22.48 to one decimal place. =
  32. 32.Which is closest to 103 + 603 + 405? (a) 1000 (b) 1300 (c) 1200 (d) 1100
  33. 33.Round 27.31 to one decimal place. =
  34. 34.Round 61.49 to one decimal place. =
  35. 35.Which is closest to 400 × 21? (Round each number first.) (a) 80000 (b) 800 (c) 16000 (d) 8000
  36. 36.Which is closest to 497 + 295 + 596? (a) 1600 (b) 1300 (c) 1500 (d) 1400
  37. 37.Which is closest to 196 × 18? (Round each number first.) (a) 4000 (b) 8000 (c) 400 (d) 40000
  38. 38.Which is closest to 296 × 89? (Round each number first.) (a) 270000 (b) 27000 (c) 2700 (d) 54000
  39. 39.Round 91887 to the nearest hundred.
  40. 40.Which is closest to 1193 ÷ 29? (a) 80 (b) 400 (c) 20 (d) 40

Answer key

  1. 50
  2. 19000
  3. 20.3
  4. 80
  5. 72.9
  6. 76000
  7. 24.9
  8. 9000
  9. 40
  10. 64000
  11. 25720
  12. 94900
  13. 30
  14. 85.2
  15. 49.8
  16. 54000
  17. 1300
  18. 36000
  19. 45400
  20. 60
  21. 14000
  22. 42000
  23. 31200
  24. 35000
  25. 54600
  26. 69.3
  27. 50
  28. 81000
  29. 27.8
  30. 700
  31. 22.5
  32. 1100
  33. 27.3
  34. 61.5
  35. 8000
  36. 1400
  37. 4000
  38. 27000
  39. 91900
  40. 40

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