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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 746 · 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 70.08 to one decimal place. =
  2. 2.Round 1496 to the nearest hundred.
  3. 3.Which is closest to 97 + 802 + 803? (a) 1800 (b) 1600 (c) 1700 (d) 1900
  4. 4.Which is closest to 799 + 704 + 801? (a) 2500 (b) 2400 (c) 2200 (d) 2300
  5. 5.Which is closest to 998 ÷ 19? (a) 25 (b) 50 (c) 100 (d) 500
  6. 6.Round 14213 to the nearest ten.
  7. 7.Which is closest to 195 + 96 + 301? (a) 700 (b) 500 (c) 600 (d) 800
  8. 8.Round 70.49 to one decimal place. =
  9. 9.Which is closest to 204 + 799 + 205? (a) 1300 (b) 1100 (c) 1200 (d) 1400
  10. 10.Which is closest to 2709 ÷ 29? (a) 180 (b) 90 (c) 45 (d) 900
  11. 11.Which is closest to 1803 ÷ 19? (a) 45 (b) 900 (c) 180 (d) 90
  12. 12.Round 24.78 to one decimal place. =
  13. 13.Round 80.78 to one decimal place. =
  14. 14.Which is closest to 695 + 95 + 199? (a) 1200 (b) 900 (c) 1000 (d) 1100
  15. 15.Which is closest to 400 + 203 + 804? (a) 1400 (b) 1300 (c) 1600 (d) 1500
  16. 16.Which is closest to 399 + 697 + 705? (a) 1700 (b) 1900 (c) 1800 (d) 2000
  17. 17.Round 5195 to the nearest thousand.
  18. 18.Which is closest to 98 + 902 + 705? (a) 1600 (b) 1900 (c) 1800 (d) 1700
  19. 19.Which is closest to 503 + 199 + 497? (a) 1100 (b) 1200 (c) 1300 (d) 1400
  20. 20.Round 83.42 to one decimal place. =
  21. 21.Which is closest to 195 + 95 + 500? (a) 1000 (b) 900 (c) 700 (d) 800
  22. 22.Round 27859 to the nearest ten.
  23. 23.Which is closest to 905 + 796 + 102? (a) 2000 (b) 1700 (c) 1800 (d) 1900
  24. 24.Which is closest to 196 × 91? (Round each number first.) (a) 18000 (b) 36000 (c) 1800 (d) 180000
  25. 25.Which is closest to 304 × 28? (Round each number first.) (a) 900 (b) 90000 (c) 9000 (d) 18000
  26. 26.Which is closest to 1596 ÷ 21? (a) 160 (b) 800 (c) 40 (d) 80
  27. 27.Round 86433 to the nearest ten.
  28. 28.Which is closest to 297 × 18? (Round each number first.) (a) 12000 (b) 6000 (c) 60000 (d) 600
  29. 29.Round 94347 to the nearest ten.
  30. 30.Which is closest to 697 × 52? (Round each number first.) (a) 350000 (b) 70000 (c) 35000 (d) 3500
  31. 31.Which is closest to 1200 ÷ 39? (a) 15 (b) 30 (c) 300 (d) 60
  32. 32.Which is closest to 703 × 68? (Round each number first.) (a) 98000 (b) 49000 (c) 490000 (d) 4900
  33. 33.Which is closest to 602 × 29? (Round each number first.) (a) 180000 (b) 36000 (c) 18000 (d) 1800
  34. 34.Which is closest to 196 + 303 + 796? (a) 1500 (b) 1400 (c) 1300 (d) 1200
  35. 35.Which is closest to 2504 ÷ 49? (a) 50 (b) 500 (c) 100 (d) 25
  36. 36.Round 87053 to the nearest hundred.
  37. 37.Which is closest to 703 × 70? (Round each number first.) (a) 98000 (b) 490000 (c) 49000 (d) 4900
  38. 38.Which is closest to 3496 ÷ 49? (a) 70 (b) 140 (c) 35 (d) 700
  39. 39.Which is closest to 2804 ÷ 41? (a) 700 (b) 140 (c) 35 (d) 70
  40. 40.Which is closest to 99 + 700 + 799? (a) 1800 (b) 1600 (c) 1700 (d) 1500

Answer key

  1. 70.1
  2. 1500
  3. 1700
  4. 2300
  5. 50
  6. 14210
  7. 600
  8. 70.5
  9. 1200
  10. 90
  11. 90
  12. 24.8
  13. 80.8
  14. 1000
  15. 1400
  16. 1800
  17. 5000
  18. 1700
  19. 1200
  20. 83.4
  21. 800
  22. 27860
  23. 1800
  24. 18000
  25. 9000
  26. 80
  27. 86430
  28. 6000
  29. 94350
  30. 35000
  31. 30
  32. 49000
  33. 18000
  34. 1300
  35. 50
  36. 87100
  37. 49000
  38. 70
  39. 70
  40. 1600

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