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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 582 · 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 15557 to the nearest thousand.
  2. 2.Round 1537 to the nearest thousand.
  3. 3.Which is closest to 796 ÷ 41? (a) 40 (b) 20 (c) 10 (d) 200
  4. 4.Round 91087 to the nearest thousand.
  5. 5.Round 21.46 to one decimal place. =
  6. 6.Round 23.81 to one decimal place. =
  7. 7.Which is closest to 798 × 52? (Round each number first.) (a) 40000 (b) 400000 (c) 4000 (d) 80000
  8. 8.Which is closest to 596 × 59? (Round each number first.) (a) 36000 (b) 3600 (c) 360000 (d) 72000
  9. 9.Which is closest to 804 × 30? (Round each number first.) (a) 240000 (b) 24000 (c) 2400 (d) 48000
  10. 10.Which is closest to 201 × 62? (Round each number first.) (a) 120000 (b) 24000 (c) 1200 (d) 12000
  11. 11.Which is closest to 2404 ÷ 39? (a) 60 (b) 120 (c) 30 (d) 600
  12. 12.Which is closest to 905 + 698 + 396? (a) 2000 (b) 2200 (c) 1900 (d) 2100
  13. 13.Round 9781 to the nearest ten.
  14. 14.Round 87.44 to one decimal place. =
  15. 15.Round 25.94 to one decimal place. =
  16. 16.Which is closest to 303 + 296 + 104? (a) 800 (b) 600 (c) 700 (d) 900
  17. 17.Which is closest to 404 + 796 + 102? (a) 1300 (b) 1400 (c) 1500 (d) 1200
  18. 18.Which is closest to 304 × 68? (Round each number first.) (a) 2100 (b) 21000 (c) 210000 (d) 42000
  19. 19.Which is closest to 1396 ÷ 19? (a) 70 (b) 700 (c) 35 (d) 140
  20. 20.Which is closest to 3499 ÷ 49? (a) 70 (b) 700 (c) 140 (d) 35
  21. 21.Which is closest to 299 + 402 + 697? (a) 1500 (b) 1300 (c) 1400 (d) 1600
  22. 22.Round 84.36 to one decimal place. =
  23. 23.Which is closest to 398 × 60? (Round each number first.) (a) 240000 (b) 48000 (c) 2400 (d) 24000
  24. 24.Which is closest to 2093 ÷ 31? (a) 35 (b) 140 (c) 700 (d) 70
  25. 25.Which is closest to 703 + 303 + 599? (a) 1500 (b) 1700 (c) 1600 (d) 1800
  26. 26.Round 23314 to the nearest ten.
  27. 27.Which is closest to 897 + 696 + 401? (a) 1900 (b) 2100 (c) 2200 (d) 2000
  28. 28.Round 49982 to the nearest hundred.
  29. 29.Which is closest to 1592 ÷ 41? (a) 20 (b) 40 (c) 80 (d) 400
  30. 30.Which is closest to 299 × 18? (Round each number first.) (a) 600 (b) 60000 (c) 6000 (d) 12000
  31. 31.Which is closest to 2404 ÷ 41? (a) 120 (b) 600 (c) 60 (d) 30
  32. 32.Round 72.21 to one decimal place. =
  33. 33.Round 27.89 to one decimal place. =
  34. 34.Which is closest to 899 + 405 + 599? (a) 1900 (b) 2100 (c) 2000 (d) 1800
  35. 35.Which is closest to 196 + 295 + 495? (a) 1000 (b) 900 (c) 1200 (d) 1100
  36. 36.Which is closest to 799 + 103 + 305? (a) 1100 (b) 1300 (c) 1400 (d) 1200
  37. 37.Which is closest to 198 + 597 + 696? (a) 1600 (b) 1700 (c) 1400 (d) 1500
  38. 38.Which is closest to 2993 ÷ 51? (a) 60 (b) 600 (c) 120 (d) 30
  39. 39.Round 53.28 to one decimal place. =
  40. 40.Which is closest to 808 ÷ 21? (a) 400 (b) 20 (c) 40 (d) 80

Answer key

  1. 16000
  2. 2000
  3. 20
  4. 91000
  5. 21.5
  6. 23.8
  7. 40000
  8. 36000
  9. 24000
  10. 12000
  11. 60
  12. 2000
  13. 9780
  14. 87.4
  15. 25.9
  16. 700
  17. 1300
  18. 21000
  19. 70
  20. 70
  21. 1400
  22. 84.4
  23. 24000
  24. 70
  25. 1600
  26. 23310
  27. 2000
  28. 50000
  29. 40
  30. 6000
  31. 60
  32. 72.2
  33. 27.9
  34. 1900
  35. 1000
  36. 1200
  37. 1500
  38. 60
  39. 53.3
  40. 40

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