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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 674 · 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 14.44 to one decimal place. =
  2. 2.Round 45978 to the nearest hundred.
  3. 3.Which is closest to 204 + 100 + 198? (a) 400 (b) 600 (c) 700 (d) 500
  4. 4.Which is closest to 1193 ÷ 19? (a) 600 (b) 120 (c) 60 (d) 30
  5. 5.Round 54.32 to one decimal place. =
  6. 6.Round 27.22 to one decimal place. =
  7. 7.Round 27.59 to one decimal place. =
  8. 8.Round 44728 to the nearest hundred.
  9. 9.Which is closest to 199 × 52? (Round each number first.) (a) 10000 (b) 100000 (c) 20000 (d) 1000
  10. 10.Which is closest to 295 + 799 + 597? (a) 1600 (b) 1800 (c) 1700 (d) 1900
  11. 11.Which is closest to 598 × 21? (Round each number first.) (a) 1200 (b) 12000 (c) 24000 (d) 120000
  12. 12.Round 57.59 to one decimal place. =
  13. 13.Which is closest to 403 × 62? (Round each number first.) (a) 2400 (b) 240000 (c) 24000 (d) 48000
  14. 14.Round 30056 to the nearest hundred.
  15. 15.Round 43.92 to one decimal place. =
  16. 16.Round 96613 to the nearest thousand.
  17. 17.Round 61.51 to one decimal place. =
  18. 18.Which is closest to 1602 ÷ 19? (a) 800 (b) 160 (c) 80 (d) 40
  19. 19.Round 45668 to the nearest thousand.
  20. 20.Which is closest to 196 × 40? (Round each number first.) (a) 16000 (b) 8000 (c) 80000 (d) 800
  21. 21.Which is closest to 597 + 302 + 499? (a) 1600 (b) 1300 (c) 1500 (d) 1400
  22. 22.Which is closest to 2792 ÷ 41? (a) 700 (b) 35 (c) 140 (d) 70
  23. 23.Which is closest to 603 × 21? (Round each number first.) (a) 1200 (b) 120000 (c) 12000 (d) 24000
  24. 24.Which is closest to 905 + 897 + 498? (a) 2200 (b) 2400 (c) 2500 (d) 2300
  25. 25.Which is closest to 1593 ÷ 21? (a) 800 (b) 80 (c) 40 (d) 160
  26. 26.Which is closest to 897 × 28? (Round each number first.) (a) 270000 (b) 2700 (c) 54000 (d) 27000
  27. 27.Round 82.87 to one decimal place. =
  28. 28.Which is closest to 404 ÷ 19? (a) 200 (b) 40 (c) 20 (d) 10
  29. 29.Round 63.77 to one decimal place. =
  30. 30.Which is closest to 202 × 48? (Round each number first.) (a) 1000 (b) 20000 (c) 10000 (d) 100000
  31. 31.Round 28321 to the nearest ten.
  32. 32.Which is closest to 699 × 31? (Round each number first.) (a) 42000 (b) 2100 (c) 21000 (d) 210000
  33. 33.Which is closest to 604 + 700 + 202? (a) 1700 (b) 1500 (c) 1400 (d) 1600
  34. 34.Which is closest to 800 + 201 + 495? (a) 1400 (b) 1500 (c) 1700 (d) 1600
  35. 35.Round 74092 to the nearest hundred.
  36. 36.Which is closest to 1193 ÷ 31? (a) 20 (b) 400 (c) 80 (d) 40
  37. 37.Round 73909 to the nearest ten.
  38. 38.Which is closest to 4008 ÷ 49? (a) 800 (b) 80 (c) 40 (d) 160
  39. 39.Which is closest to 595 ÷ 19? (a) 15 (b) 300 (c) 60 (d) 30
  40. 40.Round 32772 to the nearest ten.

Answer key

  1. 14.4
  2. 46000
  3. 500
  4. 60
  5. 54.3
  6. 27.2
  7. 27.6
  8. 44700
  9. 10000
  10. 1700
  11. 12000
  12. 57.6
  13. 24000
  14. 30100
  15. 43.9
  16. 97000
  17. 61.5
  18. 80
  19. 46000
  20. 8000
  21. 1400
  22. 70
  23. 12000
  24. 2300
  25. 80
  26. 27000
  27. 82.9
  28. 20
  29. 63.8
  30. 10000
  31. 28320
  32. 21000
  33. 1500
  34. 1500
  35. 74100
  36. 40
  37. 73910
  38. 80
  39. 30
  40. 32770

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