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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 292 · 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 2696 ÷ 31? (a) 900 (b) 90 (c) 180 (d) 45
  2. 2.Round 48.73 to one decimal place. =
  3. 3.Which is closest to 301 × 91? (Round each number first.) (a) 27000 (b) 2700 (c) 270000 (d) 54000
  4. 4.Which is closest to 603 + 103 + 603? (a) 1400 (b) 1300 (c) 1500 (d) 1200
  5. 5.Round 65726 to the nearest ten.
  6. 6.Round 79.06 to one decimal place. =
  7. 7.Which is closest to 499 + 396 + 102? (a) 1200 (b) 1100 (c) 900 (d) 1000
  8. 8.Round 23.78 to one decimal place. =
  9. 9.Round 37.38 to one decimal place. =
  10. 10.Round 96646 to the nearest thousand.
  11. 11.Which is closest to 502 + 698 + 598? (a) 1800 (b) 1900 (c) 2000 (d) 1700
  12. 12.Which is closest to 1494 ÷ 51? (a) 300 (b) 60 (c) 15 (d) 30
  13. 13.Which is closest to 200 × 68? (Round each number first.) (a) 140000 (b) 28000 (c) 1400 (d) 14000
  14. 14.Which is closest to 1491 ÷ 49? (a) 300 (b) 60 (c) 30 (d) 15
  15. 15.Which is closest to 704 × 72? (Round each number first.) (a) 98000 (b) 4900 (c) 49000 (d) 490000
  16. 16.Round 25.16 to one decimal place. =
  17. 17.Which is closest to 2506 ÷ 51? (a) 500 (b) 25 (c) 100 (d) 50
  18. 18.Which is closest to 599 × 88? (Round each number first.) (a) 540000 (b) 5400 (c) 108000 (d) 54000
  19. 19.Which is closest to 898 + 198 + 403? (a) 1700 (b) 1500 (c) 1400 (d) 1600
  20. 20.Round 83274 to the nearest thousand.
  21. 21.Which is closest to 405 + 799 + 199? (a) 1300 (b) 1500 (c) 1400 (d) 1600
  22. 22.Round 71162 to the nearest ten.
  23. 23.Which is closest to 398 ÷ 19? (a) 10 (b) 200 (c) 20 (d) 40
  24. 24.Which is closest to 302 × 69? (Round each number first.) (a) 2100 (b) 42000 (c) 210000 (d) 21000
  25. 25.Which is closest to 3503 ÷ 49? (a) 700 (b) 35 (c) 140 (d) 70
  26. 26.Round 52987 to the nearest hundred.
  27. 27.Which is closest to 296 × 20? (Round each number first.) (a) 12000 (b) 600 (c) 6000 (d) 60000
  28. 28.Which is closest to 496 + 803 + 304? (a) 1500 (b) 1700 (c) 1800 (d) 1600
  29. 29.Round 35.39 to one decimal place. =
  30. 30.Which is closest to 702 + 402 + 199? (a) 1400 (b) 1500 (c) 1200 (d) 1300
  31. 31.Round 45001 to the nearest hundred.
  32. 32.Round 42.12 to one decimal place. =
  33. 33.Round 10178 to the nearest thousand.
  34. 34.Round 71753 to the nearest thousand.
  35. 35.Which is closest to 204 × 32? (Round each number first.) (a) 6000 (b) 12000 (c) 60000 (d) 600
  36. 36.Round 61.27 to one decimal place. =
  37. 37.Round 23.29 to one decimal place. =
  38. 38.Round 39.58 to one decimal place. =
  39. 39.Which is closest to 4492 ÷ 51? (a) 90 (b) 900 (c) 45 (d) 180
  40. 40.Round 91701 to the nearest hundred.

Answer key

  1. 90
  2. 48.7
  3. 27000
  4. 1300
  5. 65730
  6. 79.1
  7. 1000
  8. 23.8
  9. 37.4
  10. 97000
  11. 1800
  12. 30
  13. 14000
  14. 30
  15. 49000
  16. 25.2
  17. 50
  18. 54000
  19. 1500
  20. 83000
  21. 1400
  22. 71160
  23. 20
  24. 21000
  25. 70
  26. 53000
  27. 6000
  28. 1600
  29. 35.4
  30. 1300
  31. 45000
  32. 42.1
  33. 10000
  34. 72000
  35. 6000
  36. 61.3
  37. 23.3
  38. 39.6
  39. 90
  40. 91700

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