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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 702 · 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 698 + 605 + 698? (a) 1900 (b) 2200 (c) 2000 (d) 2100
  2. 2.Which is closest to 796 × 70? (Round each number first.) (a) 56000 (b) 112000 (c) 560000 (d) 5600
  3. 3.Round 56079 to the nearest hundred.
  4. 4.Which is closest to 901 × 48? (Round each number first.) (a) 450000 (b) 4500 (c) 90000 (d) 45000
  5. 5.Which is closest to 199 + 101 + 895? (a) 1400 (b) 1200 (c) 1100 (d) 1300
  6. 6.Which is closest to 499 × 52? (Round each number first.) (a) 50000 (b) 2500 (c) 25000 (d) 250000
  7. 7.Which is closest to 1501 ÷ 31? (a) 100 (b) 25 (c) 500 (d) 50
  8. 8.Round 14542 to the nearest thousand.
  9. 9.Round 24.67 to one decimal place. =
  10. 10.Round 57235 to the nearest hundred.
  11. 11.Round 61133 to the nearest ten.
  12. 12.Which is closest to 597 + 401 + 901? (a) 1900 (b) 2100 (c) 2000 (d) 1800
  13. 13.Which is closest to 704 × 50? (Round each number first.) (a) 70000 (b) 350000 (c) 35000 (d) 3500
  14. 14.Which is closest to 804 + 405 + 895? (a) 2300 (b) 2200 (c) 2100 (d) 2000
  15. 15.Which is closest to 404 × 21? (Round each number first.) (a) 80000 (b) 800 (c) 8000 (d) 16000
  16. 16.Which is closest to 704 × 21? (Round each number first.) (a) 28000 (b) 14000 (c) 140000 (d) 1400
  17. 17.Round 88778 to the nearest hundred.
  18. 18.Round 64544 to the nearest thousand.
  19. 19.Round 15262 to the nearest thousand.
  20. 20.Round 29076 to the nearest thousand.
  21. 21.Which is closest to 699 × 88? (Round each number first.) (a) 63000 (b) 126000 (c) 630000 (d) 6300
  22. 22.Which is closest to 1792 ÷ 19? (a) 90 (b) 180 (c) 900 (d) 45
  23. 23.Which is closest to 297 × 68? (Round each number first.) (a) 210000 (b) 42000 (c) 2100 (d) 21000
  24. 24.Which is closest to 399 × 68? (Round each number first.) (a) 2800 (b) 280000 (c) 56000 (d) 28000
  25. 25.Round 36.23 to one decimal place. =
  26. 26.Which is closest to 1809 ÷ 19? (a) 90 (b) 45 (c) 900 (d) 180
  27. 27.Which is closest to 799 + 99 + 95? (a) 900 (b) 1200 (c) 1100 (d) 1000
  28. 28.Round 4439 to the nearest hundred.
  29. 29.Round 92.66 to one decimal place. =
  30. 30.Which is closest to 2995 ÷ 49? (a) 30 (b) 600 (c) 120 (d) 60
  31. 31.Which is closest to 1193 ÷ 19? (a) 120 (b) 600 (c) 60 (d) 30
  32. 32.Which is closest to 302 × 81? (Round each number first.) (a) 48000 (b) 240000 (c) 24000 (d) 2400
  33. 33.Which is closest to 796 × 89? (Round each number first.) (a) 720000 (b) 144000 (c) 72000 (d) 7200
  34. 34.Which is closest to 3498 ÷ 49? (a) 700 (b) 70 (c) 140 (d) 35
  35. 35.Round 68.69 to one decimal place. =
  36. 36.Which is closest to 499 × 68? (Round each number first.) (a) 350000 (b) 70000 (c) 35000 (d) 3500
  37. 37.Which is closest to 401 × 72? (Round each number first.) (a) 280000 (b) 28000 (c) 2800 (d) 56000
  38. 38.Round 81.13 to one decimal place. =
  39. 39.Round 30.33 to one decimal place. =
  40. 40.Which is closest to 2100 ÷ 29? (a) 700 (b) 140 (c) 35 (d) 70

Answer key

  1. 2000
  2. 56000
  3. 56100
  4. 45000
  5. 1200
  6. 25000
  7. 50
  8. 15000
  9. 24.7
  10. 57200
  11. 61130
  12. 1900
  13. 35000
  14. 2100
  15. 8000
  16. 14000
  17. 88800
  18. 65000
  19. 15000
  20. 29000
  21. 63000
  22. 90
  23. 21000
  24. 28000
  25. 36.2
  26. 90
  27. 1000
  28. 4400
  29. 92.7
  30. 60
  31. 60
  32. 24000
  33. 72000
  34. 70
  35. 68.7
  36. 35000
  37. 28000
  38. 81.1
  39. 30.3
  40. 70

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