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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 85 · 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 196 + 601 + 496? (a) 1400 (b) 1300 (c) 1500 (d) 1200
  2. 2.Which is closest to 1994 ÷ 49? (a) 40 (b) 400 (c) 80 (d) 20
  3. 3.Which is closest to 204 × 32? (Round each number first.) (a) 12000 (b) 6000 (c) 60000 (d) 600
  4. 4.Round 99189 to the nearest thousand.
  5. 5.Round 5056 to the nearest ten.
  6. 6.Which is closest to 200 × 89? (Round each number first.) (a) 180000 (b) 1800 (c) 36000 (d) 18000
  7. 7.Round 98.12 to one decimal place. =
  8. 8.Which is closest to 396 × 19? (Round each number first.) (a) 16000 (b) 8000 (c) 80000 (d) 800
  9. 9.Which is closest to 504 × 91? (Round each number first.) (a) 4500 (b) 90000 (c) 450000 (d) 45000
  10. 10.Round 67833 to the nearest hundred.
  11. 11.Which is closest to 1803 ÷ 31? (a) 30 (b) 60 (c) 600 (d) 120
  12. 12.Which is closest to 698 × 28? (Round each number first.) (a) 42000 (b) 2100 (c) 21000 (d) 210000
  13. 13.Round 35.47 to one decimal place. =
  14. 14.Which is closest to 1498 ÷ 29? (a) 500 (b) 50 (c) 25 (d) 100
  15. 15.Which is closest to 607 ÷ 31? (a) 200 (b) 20 (c) 40 (d) 10
  16. 16.Round 48.63 to one decimal place. =
  17. 17.Round 91625 to the nearest hundred.
  18. 18.Which is closest to 604 × 19? (Round each number first.) (a) 1200 (b) 120000 (c) 24000 (d) 12000
  19. 19.Round 24.44 to one decimal place. =
  20. 20.Round 54662 to the nearest thousand.
  21. 21.Which is closest to 1509 ÷ 29? (a) 500 (b) 100 (c) 50 (d) 25
  22. 22.Which is closest to 395 + 96 + 203? (a) 800 (b) 700 (c) 900 (d) 600
  23. 23.Which is closest to 105 + 296 + 898? (a) 1400 (b) 1500 (c) 1200 (d) 1300
  24. 24.Which is closest to 1392 ÷ 21? (a) 140 (b) 35 (c) 700 (d) 70
  25. 25.Which is closest to 1607 ÷ 41? (a) 40 (b) 20 (c) 80 (d) 400
  26. 26.Which is closest to 1006 ÷ 19? (a) 50 (b) 25 (c) 100 (d) 500
  27. 27.Round 55.66 to one decimal place. =
  28. 28.Round 34595 to the nearest thousand.
  29. 29.Which is closest to 697 × 41? (Round each number first.) (a) 2800 (b) 280000 (c) 28000 (d) 56000
  30. 30.Which is closest to 105 + 900 + 101? (a) 1300 (b) 1000 (c) 1100 (d) 1200
  31. 31.Round 58.27 to one decimal place. =
  32. 32.Which is closest to 695 + 303 + 904? (a) 2100 (b) 2000 (c) 1900 (d) 1800
  33. 33.Round 60.48 to one decimal place. =
  34. 34.Which is closest to 804 × 80? (Round each number first.) (a) 128000 (b) 640000 (c) 6400 (d) 64000
  35. 35.Which is closest to 2795 ÷ 39? (a) 70 (b) 35 (c) 700 (d) 140
  36. 36.Which is closest to 496 + 105 + 197? (a) 1000 (b) 800 (c) 700 (d) 900
  37. 37.Which is closest to 398 × 50? (Round each number first.) (a) 40000 (b) 20000 (c) 200000 (d) 2000
  38. 38.Which is closest to 701 + 896 + 795? (a) 2300 (b) 2600 (c) 2500 (d) 2400
  39. 39.Which is closest to 196 + 96 + 295? (a) 700 (b) 500 (c) 800 (d) 600
  40. 40.Which is closest to 199 × 18? (Round each number first.) (a) 4000 (b) 40000 (c) 400 (d) 8000

Answer key

  1. 1300
  2. 40
  3. 6000
  4. 99000
  5. 5060
  6. 18000
  7. 98.1
  8. 8000
  9. 45000
  10. 67800
  11. 60
  12. 21000
  13. 35.5
  14. 50
  15. 20
  16. 48.6
  17. 91600
  18. 12000
  19. 24.4
  20. 55000
  21. 50
  22. 700
  23. 1300
  24. 70
  25. 40
  26. 50
  27. 55.7
  28. 35000
  29. 28000
  30. 1100
  31. 58.3
  32. 1900
  33. 60.5
  34. 64000
  35. 70
  36. 800
  37. 20000
  38. 2400
  39. 600
  40. 4000

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