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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 536 · 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 195 + 395 + 498? (a) 1100 (b) 1300 (c) 1200 (d) 1000
  2. 2.Which is closest to 300 × 62? (Round each number first.) (a) 36000 (b) 1800 (c) 180000 (d) 18000
  3. 3.Round 69400 to the nearest thousand.
  4. 4.Which is closest to 703 × 88? (Round each number first.) (a) 630000 (b) 126000 (c) 63000 (d) 6300
  5. 5.Round 14177 to the nearest hundred.
  6. 6.Which is closest to 199 × 69? (Round each number first.) (a) 14000 (b) 1400 (c) 28000 (d) 140000
  7. 7.Which is closest to 498 × 48? (Round each number first.) (a) 25000 (b) 2500 (c) 250000 (d) 50000
  8. 8.Round 67.49 to one decimal place. =
  9. 9.Round 7912 to the nearest ten.
  10. 10.Which is closest to 3195 ÷ 39? (a) 160 (b) 80 (c) 40 (d) 800
  11. 11.Which is closest to 702 + 805 + 298? (a) 1900 (b) 1700 (c) 2000 (d) 1800
  12. 12.Which is closest to 1503 ÷ 29? (a) 500 (b) 50 (c) 100 (d) 25
  13. 13.Which is closest to 501 + 502 + 797? (a) 2000 (b) 1900 (c) 1700 (d) 1800
  14. 14.Which is closest to 697 + 902 + 400? (a) 1900 (b) 2200 (c) 2000 (d) 2100
  15. 15.Which is closest to 400 × 38? (Round each number first.) (a) 32000 (b) 16000 (c) 160000 (d) 1600
  16. 16.Which is closest to 1193 ÷ 19? (a) 120 (b) 60 (c) 30 (d) 600
  17. 17.Which is closest to 895 + 795 + 403? (a) 2300 (b) 2200 (c) 2100 (d) 2000
  18. 18.Which is closest to 699 × 59? (Round each number first.) (a) 420000 (b) 42000 (c) 4200 (d) 84000
  19. 19.Round 55054 to the nearest hundred.
  20. 20.Which is closest to 204 × 22? (Round each number first.) (a) 40000 (b) 400 (c) 8000 (d) 4000
  21. 21.Which is closest to 105 + 95 + 499? (a) 700 (b) 900 (c) 600 (d) 800
  22. 22.Which is closest to 197 + 404 + 395? (a) 1000 (b) 1100 (c) 1200 (d) 900
  23. 23.Which is closest to 199 + 401 + 303? (a) 1000 (b) 900 (c) 1100 (d) 800
  24. 24.Which is closest to 697 + 595 + 697? (a) 1900 (b) 2000 (c) 2100 (d) 2200
  25. 25.Round 95285 to the nearest thousand.
  26. 26.Which is closest to 398 × 78? (Round each number first.) (a) 320000 (b) 32000 (c) 64000 (d) 3200
  27. 27.Which is closest to 1592 ÷ 21? (a) 80 (b) 40 (c) 160 (d) 800
  28. 28.Which is closest to 802 × 29? (Round each number first.) (a) 2400 (b) 24000 (c) 48000 (d) 240000
  29. 29.Round 32593 to the nearest thousand.
  30. 30.Which is closest to 1404 ÷ 21? (a) 140 (b) 700 (c) 35 (d) 70
  31. 31.Round 65629 to the nearest ten.
  32. 32.Which is closest to 1492 ÷ 31? (a) 500 (b) 100 (c) 25 (d) 50
  33. 33.Which is closest to 1195 ÷ 41? (a) 60 (b) 15 (c) 30 (d) 300
  34. 34.Round 83691 to the nearest hundred.
  35. 35.Round 37.62 to one decimal place. =
  36. 36.Which is closest to 396 + 495 + 700? (a) 1800 (b) 1600 (c) 1500 (d) 1700
  37. 37.Round 10363 to the nearest thousand.
  38. 38.Round 23.92 to one decimal place. =
  39. 39.Which is closest to 704 + 302 + 95? (a) 1000 (b) 1200 (c) 1300 (d) 1100
  40. 40.Which is closest to 996 ÷ 19? (a) 50 (b) 500 (c) 100 (d) 25

Answer key

  1. 1100
  2. 18000
  3. 69000
  4. 63000
  5. 14200
  6. 14000
  7. 25000
  8. 67.5
  9. 7910
  10. 80
  11. 1800
  12. 50
  13. 1800
  14. 2000
  15. 16000
  16. 60
  17. 2100
  18. 42000
  19. 55100
  20. 4000
  21. 700
  22. 1000
  23. 900
  24. 2000
  25. 95000
  26. 32000
  27. 80
  28. 24000
  29. 33000
  30. 70
  31. 65630
  32. 50
  33. 30
  34. 83700
  35. 37.6
  36. 1600
  37. 10000
  38. 23.9
  39. 1100
  40. 50

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