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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 32 · 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 496 + 805 + 195? (a) 1500 (b) 1700 (c) 1600 (d) 1400
  2. 2.Which is closest to 1202 ÷ 21? (a) 600 (b) 120 (c) 30 (d) 60
  3. 3.Round 35298 to the nearest hundred.
  4. 4.Which is closest to 503 + 797 + 601? (a) 1800 (b) 2100 (c) 2000 (d) 1900
  5. 5.Round 12336 to the nearest thousand.
  6. 6.Which is closest to 805 ÷ 21? (a) 20 (b) 80 (c) 40 (d) 400
  7. 7.Round 88967 to the nearest ten.
  8. 8.Which is closest to 496 + 105 + 304? (a) 1000 (b) 800 (c) 900 (d) 1100
  9. 9.Round 63840 to the nearest hundred.
  10. 10.Round 52.43 to one decimal place. =
  11. 11.Round 20.24 to one decimal place. =
  12. 12.Round 38267 to the nearest hundred.
  13. 13.Which is closest to 202 + 704 + 103? (a) 1100 (b) 1000 (c) 900 (d) 1200
  14. 14.Which is closest to 604 + 903 + 699? (a) 2200 (b) 2100 (c) 2400 (d) 2300
  15. 15.Round 61.73 to one decimal place. =
  16. 16.Round 97.24 to one decimal place. =
  17. 17.Which is closest to 198 × 52? (Round each number first.) (a) 20000 (b) 100000 (c) 10000 (d) 1000
  18. 18.Round 26913 to the nearest thousand.
  19. 19.Which is closest to 199 + 699 + 795? (a) 1600 (b) 1800 (c) 1700 (d) 1900
  20. 20.Which is closest to 604 + 901 + 403? (a) 1900 (b) 2100 (c) 2000 (d) 1800
  21. 21.Which is closest to 699 × 19? (Round each number first.) (a) 1400 (b) 28000 (c) 140000 (d) 14000
  22. 22.Which is closest to 304 × 72? (Round each number first.) (a) 210000 (b) 2100 (c) 21000 (d) 42000
  23. 23.Which is closest to 3201 ÷ 39? (a) 80 (b) 800 (c) 160 (d) 40
  24. 24.Which is closest to 296 × 39? (Round each number first.) (a) 120000 (b) 24000 (c) 1200 (d) 12000
  25. 25.Round 10225 to the nearest hundred.
  26. 26.Which is closest to 199 + 404 + 497? (a) 1200 (b) 1100 (c) 1000 (d) 1300
  27. 27.Which is closest to 704 + 697 + 901? (a) 2200 (b) 2400 (c) 2300 (d) 2500
  28. 28.Which is closest to 596 × 82? (Round each number first.) (a) 4800 (b) 96000 (c) 48000 (d) 480000
  29. 29.Round 48219 to the nearest thousand.
  30. 30.Which is closest to 701 + 98 + 598? (a) 1400 (b) 1300 (c) 1500 (d) 1600
  31. 31.Which is closest to 1396 ÷ 21? (a) 140 (b) 70 (c) 700 (d) 35
  32. 32.Which is closest to 602 × 79? (Round each number first.) (a) 96000 (b) 4800 (c) 480000 (d) 48000
  33. 33.Which is closest to 3600 ÷ 41? (a) 180 (b) 900 (c) 45 (d) 90
  34. 34.Which is closest to 602 × 48? (Round each number first.) (a) 60000 (b) 30000 (c) 3000 (d) 300000
  35. 35.Round 57.79 to one decimal place. =
  36. 36.Which is closest to 2491 ÷ 51? (a) 25 (b) 100 (c) 500 (d) 50
  37. 37.Round 20.68 to one decimal place. =
  38. 38.Which is closest to 897 × 51? (Round each number first.) (a) 450000 (b) 45000 (c) 90000 (d) 4500
  39. 39.Which is closest to 1198 ÷ 41? (a) 60 (b) 300 (c) 15 (d) 30
  40. 40.Round 33177 to the nearest ten.

Answer key

  1. 1500
  2. 60
  3. 35300
  4. 1900
  5. 12000
  6. 40
  7. 88970
  8. 900
  9. 63800
  10. 52.4
  11. 20.2
  12. 38300
  13. 1000
  14. 2200
  15. 61.7
  16. 97.2
  17. 10000
  18. 27000
  19. 1700
  20. 1900
  21. 14000
  22. 21000
  23. 80
  24. 12000
  25. 10200
  26. 1100
  27. 2300
  28. 48000
  29. 48000
  30. 1400
  31. 70
  32. 48000
  33. 90
  34. 30000
  35. 57.8
  36. 50
  37. 20.7
  38. 45000
  39. 30
  40. 33180

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