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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 822 · 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 75.42 to one decimal place. =
  2. 2.Which is closest to 891 ÷ 29? (a) 60 (b) 300 (c) 30 (d) 15
  3. 3.Round 60.66 to one decimal place. =
  4. 4.Which is closest to 1195 ÷ 39? (a) 15 (b) 30 (c) 300 (d) 60
  5. 5.Which is closest to 992 ÷ 49? (a) 200 (b) 40 (c) 10 (d) 20
  6. 6.Which is closest to 104 + 396 + 595? (a) 1200 (b) 1300 (c) 1100 (d) 1000
  7. 7.Which is closest to 597 + 504 + 796? (a) 1900 (b) 2000 (c) 1800 (d) 2100
  8. 8.Which is closest to 1597 ÷ 21? (a) 40 (b) 160 (c) 800 (d) 80
  9. 9.Which is closest to 495 + 796 + 501? (a) 2000 (b) 1700 (c) 1800 (d) 1900
  10. 10.Which is closest to 797 + 703 + 100? (a) 1800 (b) 1700 (c) 1600 (d) 1500
  11. 11.Round 95.06 to one decimal place. =
  12. 12.Which is closest to 396 × 49? (Round each number first.) (a) 40000 (b) 2000 (c) 20000 (d) 200000
  13. 13.Which is closest to 2093 ÷ 29? (a) 700 (b) 140 (c) 70 (d) 35
  14. 14.Which is closest to 897 + 198 + 499? (a) 1700 (b) 1500 (c) 1600 (d) 1800
  15. 15.Which is closest to 304 × 92? (Round each number first.) (a) 54000 (b) 270000 (c) 27000 (d) 2700
  16. 16.Which is closest to 704 + 302 + 197? (a) 1300 (b) 1100 (c) 1400 (d) 1200
  17. 17.Round 47572 to the nearest ten.
  18. 18.Which is closest to 204 × 19? (Round each number first.) (a) 400 (b) 8000 (c) 4000 (d) 40000
  19. 19.Which is closest to 698 + 195 + 101? (a) 1100 (b) 1200 (c) 900 (d) 1000
  20. 20.Which is closest to 296 × 69? (Round each number first.) (a) 21000 (b) 2100 (c) 210000 (d) 42000
  21. 21.Round 57777 to the nearest hundred.
  22. 22.Which is closest to 902 × 58? (Round each number first.) (a) 54000 (b) 540000 (c) 5400 (d) 108000
  23. 23.Which is closest to 1202 ÷ 21? (a) 30 (b) 120 (c) 60 (d) 600
  24. 24.Which is closest to 200 × 31? (Round each number first.) (a) 60000 (b) 6000 (c) 12000 (d) 600
  25. 25.Round 86.77 to one decimal place. =
  26. 26.Round 73.68 to one decimal place. =
  27. 27.Which is closest to 2097 ÷ 31? (a) 140 (b) 35 (c) 700 (d) 70
  28. 28.Round 27.16 to one decimal place. =
  29. 29.Round 17.49 to one decimal place. =
  30. 30.Which is closest to 1609 ÷ 39? (a) 80 (b) 20 (c) 400 (d) 40
  31. 31.Which is closest to 1992 ÷ 41? (a) 25 (b) 500 (c) 50 (d) 100
  32. 32.Round 38.33 to one decimal place. =
  33. 33.Which is closest to 398 + 897 + 700? (a) 2000 (b) 2200 (c) 1900 (d) 2100
  34. 34.Round 27200 to the nearest thousand.
  35. 35.Round 3258 to the nearest ten.
  36. 36.Which is closest to 296 × 32? (Round each number first.) (a) 18000 (b) 900 (c) 90000 (d) 9000
  37. 37.Which is closest to 197 × 80? (Round each number first.) (a) 1600 (b) 32000 (c) 160000 (d) 16000
  38. 38.Which is closest to 199 × 30? (Round each number first.) (a) 600 (b) 60000 (c) 12000 (d) 6000
  39. 39.Which is closest to 501 + 296 + 195? (a) 1200 (b) 1000 (c) 1100 (d) 900
  40. 40.Which is closest to 2092 ÷ 29? (a) 140 (b) 700 (c) 35 (d) 70

Answer key

  1. 75.4
  2. 30
  3. 60.7
  4. 30
  5. 20
  6. 1100
  7. 1900
  8. 80
  9. 1800
  10. 1600
  11. 95.1
  12. 20000
  13. 70
  14. 1600
  15. 27000
  16. 1200
  17. 47570
  18. 4000
  19. 1000
  20. 21000
  21. 57800
  22. 54000
  23. 60
  24. 6000
  25. 86.8
  26. 73.7
  27. 70
  28. 27.2
  29. 17.5
  30. 40
  31. 50
  32. 38.3
  33. 2000
  34. 27000
  35. 3260
  36. 9000
  37. 16000
  38. 6000
  39. 1000
  40. 70

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