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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 772 · 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 399 + 495 + 401? (a) 1200 (b) 1300 (c) 1400 (d) 1500
  2. 2.Round 62107 to the nearest ten.
  3. 3.Round 42562 to the nearest ten.
  4. 4.Which is closest to 605 + 601 + 504? (a) 1900 (b) 1600 (c) 1700 (d) 1800
  5. 5.Which is closest to 897 + 603 + 795? (a) 2200 (b) 2500 (c) 2300 (d) 2400
  6. 6.Round 78.88 to one decimal place. =
  7. 7.Which is closest to 399 × 28? (Round each number first.) (a) 120000 (b) 1200 (c) 12000 (d) 24000
  8. 8.Which is closest to 201 × 28? (Round each number first.) (a) 600 (b) 60000 (c) 6000 (d) 12000
  9. 9.Round 70244 to the nearest hundred.
  10. 10.Which is closest to 297 × 62? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
  11. 11.Which is closest to 800 × 48? (Round each number first.) (a) 4000 (b) 40000 (c) 80000 (d) 400000
  12. 12.Round 67075 to the nearest hundred.
  13. 13.Round 86.82 to one decimal place. =
  14. 14.Which is closest to 2703 ÷ 29? (a) 90 (b) 900 (c) 45 (d) 180
  15. 15.Which is closest to 298 + 504 + 499? (a) 1500 (b) 1400 (c) 1200 (d) 1300
  16. 16.Which is closest to 200 + 197 + 702? (a) 1300 (b) 1000 (c) 1200 (d) 1100
  17. 17.Which is closest to 496 × 70? (Round each number first.) (a) 3500 (b) 350000 (c) 35000 (d) 70000
  18. 18.Round 49418 to the nearest ten.
  19. 19.Which is closest to 602 ÷ 29? (a) 40 (b) 200 (c) 20 (d) 10
  20. 20.Round 53.51 to one decimal place. =
  21. 21.Which is closest to 1195 ÷ 41? (a) 15 (b) 300 (c) 60 (d) 30
  22. 22.Which is closest to 597 × 50? (Round each number first.) (a) 3000 (b) 60000 (c) 300000 (d) 30000
  23. 23.Which is closest to 404 + 205 + 98? (a) 600 (b) 700 (c) 900 (d) 800
  24. 24.Round 64.89 to one decimal place. =
  25. 25.Which is closest to 195 + 505 + 399? (a) 1000 (b) 1200 (c) 1100 (d) 1300
  26. 26.Which is closest to 297 × 79? (Round each number first.) (a) 2400 (b) 240000 (c) 48000 (d) 24000
  27. 27.Round 58.26 to one decimal place. =
  28. 28.Round 32.61 to one decimal place. =
  29. 29.Which is closest to 801 + 901 + 395? (a) 2000 (b) 2300 (c) 2200 (d) 2100
  30. 30.Round 87951 to the nearest hundred.
  31. 31.Which is closest to 299 × 38? (Round each number first.) (a) 1200 (b) 120000 (c) 12000 (d) 24000
  32. 32.Round 27.67 to one decimal place. =
  33. 33.Which is closest to 397 × 49? (Round each number first.) (a) 200000 (b) 20000 (c) 2000 (d) 40000
  34. 34.Which is closest to 502 + 499 + 302? (a) 1400 (b) 1300 (c) 1200 (d) 1500
  35. 35.Round 95.16 to one decimal place. =
  36. 36.Which is closest to 301 × 38? (Round each number first.) (a) 1200 (b) 120000 (c) 12000 (d) 24000
  37. 37.Which is closest to 798 × 61? (Round each number first.) (a) 96000 (b) 48000 (c) 4800 (d) 480000
  38. 38.Which is closest to 1497 ÷ 51? (a) 300 (b) 30 (c) 15 (d) 60
  39. 39.Round 67597 to the nearest ten.
  40. 40.Which is closest to 398 + 804 + 702? (a) 1900 (b) 2000 (c) 1800 (d) 2100

Answer key

  1. 1300
  2. 62110
  3. 42560
  4. 1700
  5. 2300
  6. 78.9
  7. 12000
  8. 6000
  9. 70200
  10. 18000
  11. 40000
  12. 67100
  13. 86.8
  14. 90
  15. 1300
  16. 1100
  17. 35000
  18. 49420
  19. 20
  20. 53.5
  21. 30
  22. 30000
  23. 700
  24. 64.9
  25. 1100
  26. 24000
  27. 58.3
  28. 32.6
  29. 2100
  30. 88000
  31. 12000
  32. 27.7
  33. 20000
  34. 1300
  35. 95.2
  36. 12000
  37. 48000
  38. 30
  39. 67600
  40. 1900

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