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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 601 · 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 2799 ÷ 39? (a) 140 (b) 70 (c) 35 (d) 700
  2. 2.Round 74374 to the nearest ten.
  3. 3.Round 12170 to the nearest thousand.
  4. 4.Round 82814 to the nearest ten.
  5. 5.Which is closest to 203 + 396 + 900? (a) 1400 (b) 1600 (c) 1500 (d) 1700
  6. 6.Which is closest to 807 ÷ 39? (a) 200 (b) 20 (c) 10 (d) 40
  7. 7.Round 26.11 to one decimal place. =
  8. 8.Round 26.83 to one decimal place. =
  9. 9.Round 18.68 to one decimal place. =
  10. 10.Which is closest to 1493 ÷ 51? (a) 15 (b) 60 (c) 30 (d) 300
  11. 11.Round 32.57 to one decimal place. =
  12. 12.Which is closest to 591 ÷ 29? (a) 200 (b) 10 (c) 20 (d) 40
  13. 13.Which is closest to 1004 ÷ 49? (a) 200 (b) 40 (c) 20 (d) 10
  14. 14.Which is closest to 402 + 903 + 495? (a) 1900 (b) 1700 (c) 2000 (d) 1800
  15. 15.Which is closest to 696 + 898 + 795? (a) 2300 (b) 2400 (c) 2600 (d) 2500
  16. 16.Which is closest to 295 + 498 + 95? (a) 1000 (b) 900 (c) 800 (d) 1100
  17. 17.Which is closest to 899 + 201 + 902? (a) 1900 (b) 2000 (c) 2100 (d) 2200
  18. 18.Which is closest to 600 + 95 + 401? (a) 1200 (b) 1100 (c) 1300 (d) 1000
  19. 19.Which is closest to 196 × 22? (Round each number first.) (a) 4000 (b) 400 (c) 40000 (d) 8000
  20. 20.Which is closest to 302 + 498 + 895? (a) 1800 (b) 1700 (c) 1900 (d) 1600
  21. 21.Which is closest to 695 + 797 + 800? (a) 2500 (b) 2200 (c) 2300 (d) 2400
  22. 22.Which is closest to 498 × 32? (Round each number first.) (a) 1500 (b) 15000 (c) 150000 (d) 30000
  23. 23.Round 87606 to the nearest thousand.
  24. 24.Which is closest to 1593 ÷ 21? (a) 800 (b) 40 (c) 160 (d) 80
  25. 25.Which is closest to 3194 ÷ 41? (a) 800 (b) 160 (c) 40 (d) 80
  26. 26.Which is closest to 498 × 49? (Round each number first.) (a) 250000 (b) 50000 (c) 2500 (d) 25000
  27. 27.Round 48379 to the nearest thousand.
  28. 28.Round 36.47 to one decimal place. =
  29. 29.Which is closest to 895 + 297 + 295? (a) 1500 (b) 1400 (c) 1700 (d) 1600
  30. 30.Round 82236 to the nearest hundred.
  31. 31.Which is closest to 199 + 304 + 304? (a) 700 (b) 800 (c) 900 (d) 1000
  32. 32.Round 11857 to the nearest hundred.
  33. 33.Which is closest to 698 × 92? (Round each number first.) (a) 126000 (b) 63000 (c) 630000 (d) 6300
  34. 34.Which is closest to 902 × 72? (Round each number first.) (a) 630000 (b) 126000 (c) 6300 (d) 63000
  35. 35.Round 65658 to the nearest hundred.
  36. 36.Which is closest to 395 + 897 + 96? (a) 1500 (b) 1300 (c) 1600 (d) 1400
  37. 37.Round 17.26 to one decimal place. =
  38. 38.Round 15542 to the nearest hundred.
  39. 39.Round 27554 to the nearest thousand.
  40. 40.Round 42.14 to one decimal place. =

Answer key

  1. 70
  2. 74370
  3. 12000
  4. 82810
  5. 1500
  6. 20
  7. 26.1
  8. 26.8
  9. 18.7
  10. 30
  11. 32.6
  12. 20
  13. 20
  14. 1800
  15. 2400
  16. 900
  17. 2000
  18. 1100
  19. 4000
  20. 1700
  21. 2300
  22. 15000
  23. 88000
  24. 80
  25. 80
  26. 25000
  27. 48000
  28. 36.5
  29. 1500
  30. 82200
  31. 800
  32. 11900
  33. 63000
  34. 63000
  35. 65700
  36. 1400
  37. 17.3
  38. 15500
  39. 28000
  40. 42.1

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