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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 527 · 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 2001 ÷ 49? (a) 400 (b) 40 (c) 80 (d) 20
  2. 2.Which is closest to 296 + 897 + 95? (a) 1200 (b) 1500 (c) 1300 (d) 1400
  3. 3.Which is closest to 704 + 199 + 800? (a) 1600 (b) 1700 (c) 1900 (d) 1800
  4. 4.Round 62.17 to one decimal place. =
  5. 5.Which is closest to 704 + 701 + 200? (a) 1500 (b) 1800 (c) 1600 (d) 1700
  6. 6.Which is closest to 202 × 50? (Round each number first.) (a) 20000 (b) 1000 (c) 100000 (d) 10000
  7. 7.Round 52340 to the nearest hundred.
  8. 8.Which is closest to 599 + 299 + 504? (a) 1400 (b) 1600 (c) 1500 (d) 1300
  9. 9.Round 58233 to the nearest ten.
  10. 10.Which is closest to 1803 ÷ 29? (a) 30 (b) 120 (c) 600 (d) 60
  11. 11.Round 38813 to the nearest thousand.
  12. 12.Round 69967 to the nearest hundred.
  13. 13.Which is closest to 796 × 59? (Round each number first.) (a) 96000 (b) 4800 (c) 480000 (d) 48000
  14. 14.Which is closest to 399 × 81? (Round each number first.) (a) 64000 (b) 320000 (c) 3200 (d) 32000
  15. 15.Round 15.48 to one decimal place. =
  16. 16.Which is closest to 892 ÷ 31? (a) 30 (b) 15 (c) 300 (d) 60
  17. 17.Which is closest to 105 + 203 + 201? (a) 400 (b) 700 (c) 600 (d) 500
  18. 18.Which is closest to 404 × 72? (Round each number first.) (a) 56000 (b) 280000 (c) 28000 (d) 2800
  19. 19.Which is closest to 900 × 42? (Round each number first.) (a) 3600 (b) 36000 (c) 360000 (d) 72000
  20. 20.Round 96.76 to one decimal place. =
  21. 21.Which is closest to 901 × 40? (Round each number first.) (a) 3600 (b) 360000 (c) 36000 (d) 72000
  22. 22.Round 49.68 to one decimal place. =
  23. 23.Which is closest to 1202 ÷ 19? (a) 120 (b) 600 (c) 30 (d) 60
  24. 24.Round 88.36 to one decimal place. =
  25. 25.Which is closest to 400 + 903 + 495? (a) 1800 (b) 1700 (c) 2000 (d) 1900
  26. 26.Round 81213 to the nearest thousand.
  27. 27.Round 9668 to the nearest ten.
  28. 28.Round 32657 to the nearest hundred.
  29. 29.Which is closest to 3508 ÷ 51? (a) 140 (b) 700 (c) 35 (d) 70
  30. 30.Which is closest to 398 × 49? (Round each number first.) (a) 200000 (b) 20000 (c) 2000 (d) 40000
  31. 31.Which is closest to 197 × 41? (Round each number first.) (a) 16000 (b) 800 (c) 8000 (d) 80000
  32. 32.Round 17498 to the nearest thousand.
  33. 33.Which is closest to 803 + 97 + 696? (a) 1800 (b) 1700 (c) 1600 (d) 1500
  34. 34.Round 48.48 to one decimal place. =
  35. 35.Round 79.26 to one decimal place. =
  36. 36.Round 55001 to the nearest thousand.
  37. 37.Round 85337 to the nearest hundred.
  38. 38.Round 15.42 to one decimal place. =
  39. 39.Round 74594 to the nearest thousand.
  40. 40.Which is closest to 3492 ÷ 49? (a) 140 (b) 700 (c) 35 (d) 70

Answer key

  1. 40
  2. 1300
  3. 1700
  4. 62.2
  5. 1600
  6. 10000
  7. 52300
  8. 1400
  9. 58230
  10. 60
  11. 39000
  12. 70000
  13. 48000
  14. 32000
  15. 15.5
  16. 30
  17. 500
  18. 28000
  19. 36000
  20. 96.8
  21. 36000
  22. 49.7
  23. 60
  24. 88.4
  25. 1800
  26. 81000
  27. 9670
  28. 32700
  29. 70
  30. 20000
  31. 8000
  32. 17000
  33. 1600
  34. 48.5
  35. 79.3
  36. 55000
  37. 85300
  38. 15.4
  39. 75000
  40. 70

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