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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 571 · 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 498 + 404 + 396? (a) 1200 (b) 1300 (c) 1400 (d) 1500
  2. 2.Round 99.24 to one decimal place. =
  3. 3.Round 17468 to the nearest thousand.
  4. 4.Which is closest to 504 × 29? (Round each number first.) (a) 30000 (b) 150000 (c) 15000 (d) 1500
  5. 5.Which is closest to 601 ÷ 21? (a) 300 (b) 60 (c) 15 (d) 30
  6. 6.Which is closest to 1002 ÷ 49? (a) 200 (b) 10 (c) 40 (d) 20
  7. 7.Which is closest to 497 + 702 + 195? (a) 1500 (b) 1300 (c) 1400 (d) 1600
  8. 8.Which is closest to 795 ÷ 41? (a) 40 (b) 10 (c) 20 (d) 200
  9. 9.Round 71.89 to one decimal place. =
  10. 10.Which is closest to 696 + 299 + 599? (a) 1800 (b) 1600 (c) 1500 (d) 1700
  11. 11.Which is closest to 703 × 18? (Round each number first.) (a) 140000 (b) 28000 (c) 14000 (d) 1400
  12. 12.Which is closest to 802 × 71? (Round each number first.) (a) 5600 (b) 112000 (c) 56000 (d) 560000
  13. 13.Which is closest to 1396 ÷ 19? (a) 35 (b) 700 (c) 70 (d) 140
  14. 14.Round 42996 to the nearest ten.
  15. 15.Which is closest to 97 + 496 + 101? (a) 700 (b) 600 (c) 900 (d) 800
  16. 16.Which is closest to 804 + 96 + 399? (a) 1300 (b) 1400 (c) 1500 (d) 1200
  17. 17.Which is closest to 95 + 95 + 204? (a) 500 (b) 300 (c) 600 (d) 400
  18. 18.Round 56890 to the nearest hundred.
  19. 19.Round 13.34 to one decimal place. =
  20. 20.Round 46.62 to one decimal place. =
  21. 21.Which is closest to 601 × 62? (Round each number first.) (a) 3600 (b) 36000 (c) 360000 (d) 72000
  22. 22.Which is closest to 898 + 595 + 603? (a) 2100 (b) 2200 (c) 2000 (d) 2300
  23. 23.Round 41.88 to one decimal place. =
  24. 24.Which is closest to 403 × 71? (Round each number first.) (a) 2800 (b) 28000 (c) 280000 (d) 56000
  25. 25.Round 13763 to the nearest hundred.
  26. 26.Which is closest to 3608 ÷ 39? (a) 900 (b) 180 (c) 90 (d) 45
  27. 27.Which is closest to 198 × 81? (Round each number first.) (a) 1600 (b) 160000 (c) 32000 (d) 16000
  28. 28.Round 37.69 to one decimal place. =
  29. 29.Which is closest to 404 × 39? (Round each number first.) (a) 1600 (b) 16000 (c) 32000 (d) 160000
  30. 30.Round 79.57 to one decimal place. =
  31. 31.Round 71866 to the nearest hundred.
  32. 32.Which is closest to 1798 ÷ 29? (a) 600 (b) 60 (c) 120 (d) 30
  33. 33.Which is closest to 1806 ÷ 19? (a) 45 (b) 180 (c) 90 (d) 900
  34. 34.Which is closest to 498 + 498 + 500? (a) 1400 (b) 1700 (c) 1600 (d) 1500
  35. 35.Which is closest to 1193 ÷ 19? (a) 600 (b) 30 (c) 120 (d) 60
  36. 36.Which is closest to 1802 ÷ 19? (a) 900 (b) 90 (c) 180 (d) 45
  37. 37.Which is closest to 499 × 31? (Round each number first.) (a) 30000 (b) 15000 (c) 1500 (d) 150000
  38. 38.Which is closest to 501 × 29? (Round each number first.) (a) 15000 (b) 150000 (c) 1500 (d) 30000
  39. 39.Round 4923 to the nearest hundred.
  40. 40.Which is closest to 497 × 72? (Round each number first.) (a) 350000 (b) 35000 (c) 3500 (d) 70000

Answer key

  1. 1300
  2. 99.2
  3. 17000
  4. 15000
  5. 30
  6. 20
  7. 1400
  8. 20
  9. 71.9
  10. 1600
  11. 14000
  12. 56000
  13. 70
  14. 43000
  15. 700
  16. 1300
  17. 400
  18. 56900
  19. 13.3
  20. 46.6
  21. 36000
  22. 2100
  23. 41.9
  24. 28000
  25. 13800
  26. 90
  27. 16000
  28. 37.7
  29. 16000
  30. 79.6
  31. 71900
  32. 60
  33. 90
  34. 1500
  35. 60
  36. 90
  37. 15000
  38. 15000
  39. 4900
  40. 35000

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