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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 543 · 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 598 + 905 + 296? (a) 1800 (b) 1700 (c) 1900 (d) 2000
  2. 2.Round 15868 to the nearest ten.
  3. 3.Round 83952 to the nearest hundred.
  4. 4.Which is closest to 1005 ÷ 51? (a) 20 (b) 200 (c) 40 (d) 10
  5. 5.Round 67976 to the nearest thousand.
  6. 6.Round 76326 to the nearest thousand.
  7. 7.Which is closest to 196 + 597 + 205? (a) 1000 (b) 1100 (c) 1200 (d) 900
  8. 8.Which is closest to 1196 ÷ 41? (a) 60 (b) 300 (c) 15 (d) 30
  9. 9.Which is closest to 1609 ÷ 19? (a) 80 (b) 800 (c) 160 (d) 40
  10. 10.Round 66197 to the nearest ten.
  11. 11.Which is closest to 796 × 20? (Round each number first.) (a) 160000 (b) 32000 (c) 1600 (d) 16000
  12. 12.Which is closest to 704 × 90? (Round each number first.) (a) 6300 (b) 126000 (c) 630000 (d) 63000
  13. 13.Which is closest to 702 × 28? (Round each number first.) (a) 42000 (b) 21000 (c) 2100 (d) 210000
  14. 14.Which is closest to 2100 ÷ 31? (a) 140 (b) 35 (c) 700 (d) 70
  15. 15.Which is closest to 601 × 41? (Round each number first.) (a) 240000 (b) 2400 (c) 24000 (d) 48000
  16. 16.Which is closest to 303 × 29? (Round each number first.) (a) 18000 (b) 900 (c) 9000 (d) 90000
  17. 17.Which is closest to 200 × 28? (Round each number first.) (a) 12000 (b) 600 (c) 60000 (d) 6000
  18. 18.Which is closest to 901 × 62? (Round each number first.) (a) 54000 (b) 5400 (c) 540000 (d) 108000
  19. 19.Round 50059 to the nearest thousand.
  20. 20.Which is closest to 302 × 42? (Round each number first.) (a) 24000 (b) 1200 (c) 12000 (d) 120000
  21. 21.Which is closest to 2707 ÷ 31? (a) 90 (b) 45 (c) 900 (d) 180
  22. 22.Round 19.12 to one decimal place. =
  23. 23.Which is closest to 897 + 305 + 600? (a) 1800 (b) 1700 (c) 1900 (d) 2000
  24. 24.Which is closest to 893 ÷ 31? (a) 15 (b) 30 (c) 300 (d) 60
  25. 25.Which is closest to 1798 ÷ 31? (a) 30 (b) 60 (c) 120 (d) 600
  26. 26.Which is closest to 304 × 90? (Round each number first.) (a) 270000 (b) 27000 (c) 54000 (d) 2700
  27. 27.Which is closest to 198 × 49? (Round each number first.) (a) 1000 (b) 100000 (c) 10000 (d) 20000
  28. 28.Which is closest to 2097 ÷ 29? (a) 140 (b) 700 (c) 70 (d) 35
  29. 29.Round 28245 to the nearest thousand.
  30. 30.Which is closest to 2796 ÷ 41? (a) 70 (b) 140 (c) 35 (d) 700
  31. 31.Which is closest to 102 + 905 + 305? (a) 1400 (b) 1300 (c) 1200 (d) 1500
  32. 32.Which is closest to 204 + 905 + 297? (a) 1400 (b) 1600 (c) 1300 (d) 1500
  33. 33.Round 58.22 to one decimal place. =
  34. 34.Which is closest to 999 ÷ 21? (a) 100 (b) 25 (c) 50 (d) 500
  35. 35.Which is closest to 204 + 99 + 95? (a) 500 (b) 600 (c) 400 (d) 300
  36. 36.Which is closest to 2509 ÷ 49? (a) 100 (b) 25 (c) 50 (d) 500
  37. 37.Which is closest to 200 + 401 + 198? (a) 700 (b) 900 (c) 1000 (d) 800
  38. 38.Which is closest to 300 × 21? (Round each number first.) (a) 600 (b) 12000 (c) 60000 (d) 6000
  39. 39.Round 11.84 to one decimal place. =
  40. 40.Which is closest to 898 + 796 + 802? (a) 2700 (b) 2600 (c) 2400 (d) 2500

Answer key

  1. 1800
  2. 15870
  3. 84000
  4. 20
  5. 68000
  6. 76000
  7. 1000
  8. 30
  9. 80
  10. 66200
  11. 16000
  12. 63000
  13. 21000
  14. 70
  15. 24000
  16. 9000
  17. 6000
  18. 54000
  19. 50000
  20. 12000
  21. 90
  22. 19.1
  23. 1800
  24. 30
  25. 60
  26. 27000
  27. 10000
  28. 70
  29. 28000
  30. 70
  31. 1300
  32. 1400
  33. 58.2
  34. 50
  35. 400
  36. 50
  37. 800
  38. 6000
  39. 11.8
  40. 2500

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