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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 201 · 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.Round 16.87 to one decimal place. =
  2. 2.Round 76.86 to one decimal place. =
  3. 3.Which is closest to 1195 ÷ 31? (a) 80 (b) 400 (c) 20 (d) 40
  4. 4.Round 36659 to the nearest thousand.
  5. 5.Which is closest to 497 + 397 + 804? (a) 1900 (b) 1800 (c) 1600 (d) 1700
  6. 6.Which is closest to 603 × 39? (Round each number first.) (a) 240000 (b) 24000 (c) 48000 (d) 2400
  7. 7.Which is closest to 2005 ÷ 41? (a) 50 (b) 500 (c) 100 (d) 25
  8. 8.Which is closest to 301 + 904 + 905? (a) 2300 (b) 2000 (c) 2100 (d) 2200
  9. 9.Round 51.79 to one decimal place. =
  10. 10.Round 84727 to the nearest ten.
  11. 11.Which is closest to 604 + 703 + 202? (a) 1400 (b) 1500 (c) 1700 (d) 1600
  12. 12.Which is closest to 201 + 297 + 95? (a) 700 (b) 800 (c) 500 (d) 600
  13. 13.Which is closest to 2091 ÷ 31? (a) 35 (b) 140 (c) 70 (d) 700
  14. 14.Which is closest to 894 ÷ 29? (a) 15 (b) 300 (c) 60 (d) 30
  15. 15.Which is closest to 594 ÷ 21? (a) 300 (b) 30 (c) 60 (d) 15
  16. 16.Which is closest to 699 × 59? (Round each number first.) (a) 420000 (b) 84000 (c) 42000 (d) 4200
  17. 17.Round 88832 to the nearest thousand.
  18. 18.Which is closest to 796 × 62? (Round each number first.) (a) 4800 (b) 96000 (c) 480000 (d) 48000
  19. 19.Round 27563 to the nearest ten.
  20. 20.Round 53.62 to one decimal place. =
  21. 21.Which is closest to 803 × 22? (Round each number first.) (a) 16000 (b) 160000 (c) 32000 (d) 1600
  22. 22.Round 22.51 to one decimal place. =
  23. 23.Round 11.37 to one decimal place. =
  24. 24.Round 31451 to the nearest thousand.
  25. 25.Round 3822 to the nearest hundred.
  26. 26.Which is closest to 298 + 299 + 504? (a) 1100 (b) 1000 (c) 1200 (d) 1300
  27. 27.Which is closest to 602 × 91? (Round each number first.) (a) 54000 (b) 540000 (c) 108000 (d) 5400
  28. 28.Round 83967 to the nearest ten.
  29. 29.Which is closest to 899 × 88? (Round each number first.) (a) 162000 (b) 8100 (c) 810000 (d) 81000
  30. 30.Which is closest to 900 + 202 + 495? (a) 1500 (b) 1700 (c) 1800 (d) 1600
  31. 31.Round 23231 to the nearest ten.
  32. 32.Round 56.19 to one decimal place. =
  33. 33.Round 48862 to the nearest thousand.
  34. 34.Round 96.51 to one decimal place. =
  35. 35.Which is closest to 4008 ÷ 51? (a) 800 (b) 160 (c) 40 (d) 80
  36. 36.Round 79042 to the nearest thousand.
  37. 37.Round 12.12 to one decimal place. =
  38. 38.Which is closest to 196 × 59? (Round each number first.) (a) 1200 (b) 24000 (c) 12000 (d) 120000
  39. 39.Which is closest to 202 × 21? (Round each number first.) (a) 8000 (b) 40000 (c) 4000 (d) 400
  40. 40.Round 79892 to the nearest thousand.

Answer key

  1. 16.9
  2. 76.9
  3. 40
  4. 37000
  5. 1700
  6. 24000
  7. 50
  8. 2100
  9. 51.8
  10. 84730
  11. 1500
  12. 600
  13. 70
  14. 30
  15. 30
  16. 42000
  17. 89000
  18. 48000
  19. 27560
  20. 53.6
  21. 16000
  22. 22.5
  23. 11.4
  24. 31000
  25. 3800
  26. 1100
  27. 54000
  28. 83970
  29. 81000
  30. 1600
  31. 23230
  32. 56.2
  33. 49000
  34. 96.5
  35. 80
  36. 79000
  37. 12.1
  38. 12000
  39. 4000
  40. 80000

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