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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 925 · 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 63.54 to one decimal place. =
  2. 2.Which is closest to 2396 ÷ 39? (a) 120 (b) 30 (c) 600 (d) 60
  3. 3.Which is closest to 807 ÷ 41? (a) 200 (b) 40 (c) 20 (d) 10
  4. 4.Which is closest to 198 + 101 + 105? (a) 600 (b) 400 (c) 500 (d) 300
  5. 5.Round 37372 to the nearest thousand.
  6. 6.Which is closest to 593 ÷ 19? (a) 300 (b) 15 (c) 30 (d) 60
  7. 7.Which is closest to 701 + 101 + 300? (a) 1100 (b) 1300 (c) 1000 (d) 1200
  8. 8.Round 19761 to the nearest ten.
  9. 9.Which is closest to 304 × 19? (Round each number first.) (a) 6000 (b) 600 (c) 12000 (d) 60000
  10. 10.Which is closest to 1194 ÷ 31? (a) 400 (b) 80 (c) 40 (d) 20
  11. 11.Which is closest to 603 × 70? (Round each number first.) (a) 4200 (b) 84000 (c) 420000 (d) 42000
  12. 12.Which is closest to 600 × 78? (Round each number first.) (a) 48000 (b) 96000 (c) 480000 (d) 4800
  13. 13.Round 7822 to the nearest ten.
  14. 14.Which is closest to 296 × 18? (Round each number first.) (a) 60000 (b) 600 (c) 12000 (d) 6000
  15. 15.Which is closest to 297 × 88? (Round each number first.) (a) 54000 (b) 270000 (c) 27000 (d) 2700
  16. 16.Which is closest to 3492 ÷ 51? (a) 70 (b) 140 (c) 700 (d) 35
  17. 17.Which is closest to 4493 ÷ 51? (a) 900 (b) 45 (c) 90 (d) 180
  18. 18.Which is closest to 3604 ÷ 39? (a) 180 (b) 900 (c) 90 (d) 45
  19. 19.Which is closest to 698 × 39? (Round each number first.) (a) 56000 (b) 280000 (c) 2800 (d) 28000
  20. 20.Which is closest to 204 × 49? (Round each number first.) (a) 100000 (b) 10000 (c) 1000 (d) 20000
  21. 21.Which is closest to 205 + 96 + 495? (a) 700 (b) 1000 (c) 900 (d) 800
  22. 22.Which is closest to 3209 ÷ 41? (a) 40 (b) 800 (c) 160 (d) 80
  23. 23.Round 55.28 to one decimal place. =
  24. 24.Round 31554 to the nearest thousand.
  25. 25.Which is closest to 808 ÷ 19? (a) 80 (b) 40 (c) 20 (d) 400
  26. 26.Round 19.62 to one decimal place. =
  27. 27.Round 1969 to the nearest hundred.
  28. 28.Which is closest to 697 + 103 + 198? (a) 1100 (b) 900 (c) 1200 (d) 1000
  29. 29.Which is closest to 804 × 48? (Round each number first.) (a) 4000 (b) 400000 (c) 80000 (d) 40000
  30. 30.Which is closest to 904 + 604 + 300? (a) 1900 (b) 1800 (c) 1700 (d) 2000
  31. 31.Which is closest to 603 + 697 + 703? (a) 2200 (b) 1900 (c) 2100 (d) 2000
  32. 32.Round 56.82 to one decimal place. =
  33. 33.Which is closest to 495 + 700 + 600? (a) 1900 (b) 1700 (c) 2000 (d) 1800
  34. 34.Round 52133 to the nearest thousand.
  35. 35.Which is closest to 807 ÷ 19? (a) 40 (b) 80 (c) 20 (d) 400
  36. 36.Which is closest to 604 ÷ 29? (a) 40 (b) 10 (c) 200 (d) 20
  37. 37.Which is closest to 1000 ÷ 19? (a) 100 (b) 50 (c) 500 (d) 25
  38. 38.Round 25942 to the nearest hundred.
  39. 39.Which is closest to 597 × 19? (Round each number first.) (a) 12000 (b) 1200 (c) 120000 (d) 24000
  40. 40.Which is closest to 2708 ÷ 29? (a) 180 (b) 45 (c) 900 (d) 90

Answer key

  1. 63.5
  2. 60
  3. 20
  4. 400
  5. 37000
  6. 30
  7. 1100
  8. 19760
  9. 6000
  10. 40
  11. 42000
  12. 48000
  13. 7820
  14. 6000
  15. 27000
  16. 70
  17. 90
  18. 90
  19. 28000
  20. 10000
  21. 800
  22. 80
  23. 55.3
  24. 32000
  25. 40
  26. 19.6
  27. 2000
  28. 1000
  29. 40000
  30. 1800
  31. 2000
  32. 56.8
  33. 1800
  34. 52000
  35. 40
  36. 20
  37. 50
  38. 25900
  39. 12000
  40. 90

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