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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 975 · 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 2400 ÷ 41? (a) 600 (b) 30 (c) 120 (d) 60
  2. 2.Which is closest to 199 + 896 + 104? (a) 1300 (b) 1100 (c) 1400 (d) 1200
  3. 3.Round 17.81 to one decimal place. =
  4. 4.Which is closest to 1802 ÷ 29? (a) 120 (b) 30 (c) 600 (d) 60
  5. 5.Which is closest to 1593 ÷ 41? (a) 20 (b) 80 (c) 400 (d) 40
  6. 6.Which is closest to 801 ÷ 39? (a) 200 (b) 20 (c) 10 (d) 40
  7. 7.Round 50021 to the nearest hundred.
  8. 8.Round 18.34 to one decimal place. =
  9. 9.Which is closest to 199 × 39? (Round each number first.) (a) 80000 (b) 800 (c) 8000 (d) 16000
  10. 10.Which is closest to 296 + 796 + 199? (a) 1400 (b) 1300 (c) 1500 (d) 1200
  11. 11.Round 52.94 to one decimal place. =
  12. 12.Which is closest to 503 × 48? (Round each number first.) (a) 250000 (b) 2500 (c) 50000 (d) 25000
  13. 13.Round 28.06 to one decimal place. =
  14. 14.Which is closest to 597 + 99 + 800? (a) 1500 (b) 1600 (c) 1700 (d) 1400
  15. 15.Which is closest to 404 × 49? (Round each number first.) (a) 20000 (b) 2000 (c) 40000 (d) 200000
  16. 16.Which is closest to 902 ÷ 31? (a) 60 (b) 15 (c) 300 (d) 30
  17. 17.Round 30.54 to one decimal place. =
  18. 18.Which is closest to 398 × 28? (Round each number first.) (a) 12000 (b) 24000 (c) 1200 (d) 120000
  19. 19.Which is closest to 796 ÷ 39? (a) 20 (b) 200 (c) 10 (d) 40
  20. 20.Round 94678 to the nearest thousand.
  21. 21.Which is closest to 902 × 28? (Round each number first.) (a) 270000 (b) 2700 (c) 54000 (d) 27000
  22. 22.Which is closest to 1203 ÷ 19? (a) 600 (b) 30 (c) 120 (d) 60
  23. 23.Which is closest to 2992 ÷ 51? (a) 600 (b) 30 (c) 120 (d) 60
  24. 24.Which is closest to 196 × 68? (Round each number first.) (a) 1400 (b) 140000 (c) 14000 (d) 28000
  25. 25.Which is closest to 299 × 80? (Round each number first.) (a) 240000 (b) 2400 (c) 48000 (d) 24000
  26. 26.Round 29.84 to one decimal place. =
  27. 27.Which is closest to 398 × 21? (Round each number first.) (a) 16000 (b) 80000 (c) 8000 (d) 800
  28. 28.Which is closest to 402 × 22? (Round each number first.) (a) 80000 (b) 800 (c) 16000 (d) 8000
  29. 29.Which is closest to 899 + 304 + 97? (a) 1300 (b) 1500 (c) 1400 (d) 1200
  30. 30.Which is closest to 495 + 301 + 196? (a) 1000 (b) 900 (c) 1200 (d) 1100
  31. 31.Which is closest to 701 + 801 + 399? (a) 1900 (b) 2000 (c) 1800 (d) 2100
  32. 32.Which is closest to 1396 ÷ 21? (a) 700 (b) 140 (c) 35 (d) 70
  33. 33.Which is closest to 498 × 68? (Round each number first.) (a) 3500 (b) 350000 (c) 35000 (d) 70000
  34. 34.Which is closest to 902 × 41? (Round each number first.) (a) 360000 (b) 3600 (c) 72000 (d) 36000
  35. 35.Round 85.92 to one decimal place. =
  36. 36.Round 31967 to the nearest hundred.
  37. 37.Round 64532 to the nearest hundred.
  38. 38.Which is closest to 200 × 52? (Round each number first.) (a) 20000 (b) 1000 (c) 100000 (d) 10000
  39. 39.Round 36.88 to one decimal place. =
  40. 40.Which is closest to 1194 ÷ 41? (a) 60 (b) 30 (c) 300 (d) 15

Answer key

  1. 60
  2. 1200
  3. 17.8
  4. 60
  5. 40
  6. 20
  7. 50000
  8. 18.3
  9. 8000
  10. 1300
  11. 52.9
  12. 25000
  13. 28.1
  14. 1500
  15. 20000
  16. 30
  17. 30.5
  18. 12000
  19. 20
  20. 95000
  21. 27000
  22. 60
  23. 60
  24. 14000
  25. 24000
  26. 29.8
  27. 8000
  28. 8000
  29. 1300
  30. 1000
  31. 1900
  32. 70
  33. 35000
  34. 36000
  35. 85.9
  36. 32000
  37. 64500
  38. 10000
  39. 36.9
  40. 30

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