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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 546 · 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 9013 to the nearest hundred.
  2. 2.Round 19580 to the nearest hundred.
  3. 3.Which is closest to 1801 ÷ 29? (a) 120 (b) 60 (c) 600 (d) 30
  4. 4.Which is closest to 3005 ÷ 49? (a) 600 (b) 30 (c) 60 (d) 120
  5. 5.Which is closest to 1207 ÷ 29? (a) 40 (b) 20 (c) 400 (d) 80
  6. 6.Which is closest to 406 ÷ 19? (a) 200 (b) 20 (c) 10 (d) 40
  7. 7.Which is closest to 4506 ÷ 49? (a) 900 (b) 45 (c) 90 (d) 180
  8. 8.Which is closest to 299 + 603 + 702? (a) 1500 (b) 1600 (c) 1800 (d) 1700
  9. 9.Which is closest to 497 × 19? (Round each number first.) (a) 100000 (b) 1000 (c) 10000 (d) 20000
  10. 10.Which is closest to 404 + 696 + 899? (a) 2200 (b) 1900 (c) 2000 (d) 2100
  11. 11.Which is closest to 301 + 198 + 900? (a) 1300 (b) 1500 (c) 1600 (d) 1400
  12. 12.Round 24.13 to one decimal place. =
  13. 13.Round 63.56 to one decimal place. =
  14. 14.Round 91.64 to one decimal place. =
  15. 15.Which is closest to 1495 ÷ 49? (a) 15 (b) 60 (c) 300 (d) 30
  16. 16.Round 28.84 to one decimal place. =
  17. 17.Round 28.94 to one decimal place. =
  18. 18.Which is closest to 1996 ÷ 51? (a) 80 (b) 20 (c) 400 (d) 40
  19. 19.Round 36.53 to one decimal place. =
  20. 20.Which is closest to 500 × 58? (Round each number first.) (a) 300000 (b) 30000 (c) 3000 (d) 60000
  21. 21.Round 73.61 to one decimal place. =
  22. 22.Which is closest to 203 + 396 + 796? (a) 1500 (b) 1400 (c) 1600 (d) 1300
  23. 23.Which is closest to 2408 ÷ 41? (a) 60 (b) 600 (c) 120 (d) 30
  24. 24.Which is closest to 595 ÷ 19? (a) 15 (b) 300 (c) 60 (d) 30
  25. 25.Round 16961 to the nearest thousand.
  26. 26.Which is closest to 904 × 31? (Round each number first.) (a) 270000 (b) 2700 (c) 27000 (d) 54000
  27. 27.Which is closest to 497 + 204 + 304? (a) 1100 (b) 1200 (c) 900 (d) 1000
  28. 28.Which is closest to 2101 ÷ 31? (a) 140 (b) 70 (c) 35 (d) 700
  29. 29.Which is closest to 798 + 199 + 502? (a) 1500 (b) 1400 (c) 1600 (d) 1700
  30. 30.Which is closest to 505 + 397 + 98? (a) 900 (b) 1200 (c) 1100 (d) 1000
  31. 31.Which is closest to 196 × 18? (Round each number first.) (a) 40000 (b) 4000 (c) 400 (d) 8000
  32. 32.Round 8788 to the nearest ten.
  33. 33.Round 64743 to the nearest hundred.
  34. 34.Which is closest to 997 ÷ 19? (a) 500 (b) 100 (c) 25 (d) 50
  35. 35.Round 19.54 to one decimal place. =
  36. 36.Round 18194 to the nearest thousand.
  37. 37.Round 90.36 to one decimal place. =
  38. 38.Which is closest to 497 × 69? (Round each number first.) (a) 3500 (b) 350000 (c) 35000 (d) 70000
  39. 39.Which is closest to 1796 ÷ 31? (a) 120 (b) 600 (c) 30 (d) 60
  40. 40.Which is closest to 205 + 203 + 904? (a) 1200 (b) 1400 (c) 1300 (d) 1500

Answer key

  1. 9000
  2. 19600
  3. 60
  4. 60
  5. 40
  6. 20
  7. 90
  8. 1600
  9. 10000
  10. 2000
  11. 1400
  12. 24.1
  13. 63.6
  14. 91.6
  15. 30
  16. 28.8
  17. 28.9
  18. 40
  19. 36.5
  20. 30000
  21. 73.6
  22. 1400
  23. 60
  24. 30
  25. 17000
  26. 27000
  27. 1000
  28. 70
  29. 1500
  30. 1000
  31. 4000
  32. 8790
  33. 64700
  34. 50
  35. 19.5
  36. 18000
  37. 90.4
  38. 35000
  39. 60
  40. 1300

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