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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 783 · 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 2395 ÷ 41? (a) 120 (b) 60 (c) 600 (d) 30
  2. 2.Round 1714 to the nearest ten.
  3. 3.Round 14.37 to one decimal place. =
  4. 4.Round 47.78 to one decimal place. =
  5. 5.Which is closest to 299 + 99 + 903? (a) 1400 (b) 1300 (c) 1500 (d) 1200
  6. 6.Which is closest to 703 + 805 + 400? (a) 1800 (b) 2100 (c) 2000 (d) 1900
  7. 7.Which is closest to 896 × 52? (Round each number first.) (a) 45000 (b) 4500 (c) 450000 (d) 90000
  8. 8.Which is closest to 596 × 72? (Round each number first.) (a) 84000 (b) 420000 (c) 42000 (d) 4200
  9. 9.Round 7860 to the nearest hundred.
  10. 10.Which is closest to 702 × 19? (Round each number first.) (a) 28000 (b) 140000 (c) 14000 (d) 1400
  11. 11.Round 12276 to the nearest hundred.
  12. 12.Round 53.33 to one decimal place. =
  13. 13.Which is closest to 497 × 80? (Round each number first.) (a) 40000 (b) 400000 (c) 4000 (d) 80000
  14. 14.Which is closest to 1201 ÷ 41? (a) 60 (b) 15 (c) 300 (d) 30
  15. 15.Which is closest to 901 × 92? (Round each number first.) (a) 810000 (b) 81000 (c) 162000 (d) 8100
  16. 16.Round 59.52 to one decimal place. =
  17. 17.Which is closest to 303 + 397 + 902? (a) 1500 (b) 1600 (c) 1700 (d) 1800
  18. 18.Which is closest to 1993 ÷ 51? (a) 400 (b) 20 (c) 80 (d) 40
  19. 19.Which is closest to 895 + 202 + 96? (a) 1300 (b) 1400 (c) 1200 (d) 1100
  20. 20.Round 23.33 to one decimal place. =
  21. 21.Which is closest to 1806 ÷ 31? (a) 30 (b) 120 (c) 600 (d) 60
  22. 22.Round 30.93 to one decimal place. =
  23. 23.Round 14.94 to one decimal place. =
  24. 24.Which is closest to 800 × 88? (Round each number first.) (a) 7200 (b) 720000 (c) 72000 (d) 144000
  25. 25.Which is closest to 1404 ÷ 19? (a) 35 (b) 700 (c) 140 (d) 70
  26. 26.Which is closest to 904 × 71? (Round each number first.) (a) 6300 (b) 126000 (c) 630000 (d) 63000
  27. 27.Which is closest to 105 + 700 + 504? (a) 1200 (b) 1400 (c) 1300 (d) 1500
  28. 28.Which is closest to 498 + 203 + 797? (a) 1600 (b) 1700 (c) 1500 (d) 1400
  29. 29.Which is closest to 697 × 52? (Round each number first.) (a) 35000 (b) 70000 (c) 3500 (d) 350000
  30. 30.Round 19.81 to one decimal place. =
  31. 31.Round 21761 to the nearest ten.
  32. 32.Round 52855 to the nearest thousand.
  33. 33.Round 65937 to the nearest hundred.
  34. 34.Round 62091 to the nearest ten.
  35. 35.Which is closest to 305 + 203 + 299? (a) 800 (b) 700 (c) 1000 (d) 900
  36. 36.Round 84457 to the nearest thousand.
  37. 37.Which is closest to 299 × 79? (Round each number first.) (a) 24000 (b) 240000 (c) 48000 (d) 2400
  38. 38.Which is closest to 4491 ÷ 49? (a) 900 (b) 180 (c) 45 (d) 90
  39. 39.Which is closest to 296 × 71? (Round each number first.) (a) 2100 (b) 21000 (c) 42000 (d) 210000
  40. 40.Round 77658 to the nearest thousand.

Answer key

  1. 60
  2. 1710
  3. 14.4
  4. 47.8
  5. 1300
  6. 1900
  7. 45000
  8. 42000
  9. 7900
  10. 14000
  11. 12300
  12. 53.3
  13. 40000
  14. 30
  15. 81000
  16. 59.5
  17. 1600
  18. 40
  19. 1200
  20. 23.3
  21. 60
  22. 30.9
  23. 14.9
  24. 72000
  25. 70
  26. 63000
  27. 1300
  28. 1500
  29. 35000
  30. 19.8
  31. 21760
  32. 53000
  33. 65900
  34. 62090
  35. 800
  36. 84000
  37. 24000
  38. 90
  39. 21000
  40. 78000

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