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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 472 · 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 3003 ÷ 51? (a) 120 (b) 600 (c) 60 (d) 30
  2. 2.Round 60484 to the nearest ten.
  3. 3.Round 14.18 to one decimal place. =
  4. 4.Which is closest to 796 + 605 + 200? (a) 1700 (b) 1800 (c) 1600 (d) 1500
  5. 5.Which is closest to 97 + 203 + 605? (a) 1100 (b) 900 (c) 800 (d) 1000
  6. 6.Round 73.47 to one decimal place. =
  7. 7.Round 17388 to the nearest ten.
  8. 8.Which is closest to 2493 ÷ 51? (a) 500 (b) 25 (c) 50 (d) 100
  9. 9.Which is closest to 600 × 32? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000
  10. 10.Round 24.31 to one decimal place. =
  11. 11.Which is closest to 204 + 98 + 695? (a) 1200 (b) 900 (c) 1100 (d) 1000
  12. 12.Which is closest to 799 × 38? (Round each number first.) (a) 3200 (b) 32000 (c) 64000 (d) 320000
  13. 13.Which is closest to 298 + 904 + 605? (a) 2000 (b) 1900 (c) 1800 (d) 1700
  14. 14.Which is closest to 396 × 51? (Round each number first.) (a) 40000 (b) 20000 (c) 200000 (d) 2000
  15. 15.Which is closest to 999 ÷ 51? (a) 40 (b) 20 (c) 10 (d) 200
  16. 16.Which is closest to 197 × 29? (Round each number first.) (a) 60000 (b) 600 (c) 12000 (d) 6000
  17. 17.Round 63366 to the nearest thousand.
  18. 18.Which is closest to 595 + 295 + 96? (a) 1000 (b) 1100 (c) 1200 (d) 900
  19. 19.Round 72701 to the nearest hundred.
  20. 20.Which is closest to 902 × 92? (Round each number first.) (a) 8100 (b) 810000 (c) 81000 (d) 162000
  21. 21.Round 44157 to the nearest thousand.
  22. 22.Which is closest to 2809 ÷ 41? (a) 70 (b) 140 (c) 700 (d) 35
  23. 23.Round 30869 to the nearest hundred.
  24. 24.Round 48.31 to one decimal place. =
  25. 25.Round 35059 to the nearest thousand.
  26. 26.Round 59.27 to one decimal place. =
  27. 27.Which is closest to 502 + 795 + 903? (a) 2300 (b) 2400 (c) 2200 (d) 2100
  28. 28.Which is closest to 203 + 895 + 202? (a) 1300 (b) 1500 (c) 1400 (d) 1200
  29. 29.Round 92368 to the nearest hundred.
  30. 30.Which is closest to 2703 ÷ 29? (a) 180 (b) 45 (c) 900 (d) 90
  31. 31.Which is closest to 1394 ÷ 19? (a) 700 (b) 70 (c) 35 (d) 140
  32. 32.Which is closest to 600 × 81? (Round each number first.) (a) 48000 (b) 96000 (c) 480000 (d) 4800
  33. 33.Round 56537 to the nearest hundred.
  34. 34.Which is closest to 304 × 68? (Round each number first.) (a) 42000 (b) 210000 (c) 2100 (d) 21000
  35. 35.Round 71.09 to one decimal place. =
  36. 36.Which is closest to 804 × 28? (Round each number first.) (a) 240000 (b) 2400 (c) 48000 (d) 24000
  37. 37.Round 48.48 to one decimal place. =
  38. 38.Which is closest to 203 + 903 + 403? (a) 1600 (b) 1700 (c) 1500 (d) 1400
  39. 39.Round 62.72 to one decimal place. =
  40. 40.Round 85.46 to one decimal place. =

Answer key

  1. 60
  2. 60480
  3. 14.2
  4. 1600
  5. 900
  6. 73.5
  7. 17390
  8. 50
  9. 18000
  10. 24.3
  11. 1000
  12. 32000
  13. 1800
  14. 20000
  15. 20
  16. 6000
  17. 63000
  18. 1000
  19. 72700
  20. 81000
  21. 44000
  22. 70
  23. 30900
  24. 48.3
  25. 35000
  26. 59.3
  27. 2200
  28. 1300
  29. 92400
  30. 90
  31. 70
  32. 48000
  33. 56500
  34. 21000
  35. 71.1
  36. 24000
  37. 48.5
  38. 1500
  39. 62.7
  40. 85.5

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