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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 784 · 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.Round 1909 to the nearest ten.
  2. 2.Which is closest to 1506 ÷ 29? (a) 100 (b) 25 (c) 50 (d) 500
  3. 3.Which is closest to 303 × 28? (Round each number first.) (a) 9000 (b) 90000 (c) 900 (d) 18000
  4. 4.Which is closest to 196 + 802 + 198? (a) 1100 (b) 1400 (c) 1200 (d) 1300
  5. 5.Round 78056 to the nearest hundred.
  6. 6.Which is closest to 397 × 68? (Round each number first.) (a) 56000 (b) 2800 (c) 28000 (d) 280000
  7. 7.Round 48.63 to one decimal place. =
  8. 8.Which is closest to 601 ÷ 21? (a) 300 (b) 60 (c) 15 (d) 30
  9. 9.Which is closest to 203 × 61? (Round each number first.) (a) 12000 (b) 1200 (c) 120000 (d) 24000
  10. 10.Round 66792 to the nearest thousand.
  11. 11.Round 47953 to the nearest hundred.
  12. 12.Round 23.36 to one decimal place. =
  13. 13.Round 49.47 to one decimal place. =
  14. 14.Which is closest to 2996 ÷ 51? (a) 600 (b) 120 (c) 30 (d) 60
  15. 15.Round 10457 to the nearest thousand.
  16. 16.Round 35216 to the nearest thousand.
  17. 17.Which is closest to 402 + 404 + 595? (a) 1300 (b) 1500 (c) 1600 (d) 1400
  18. 18.Which is closest to 407 ÷ 19? (a) 200 (b) 20 (c) 40 (d) 10
  19. 19.Round 98064 to the nearest thousand.
  20. 20.Which is closest to 200 × 49? (Round each number first.) (a) 20000 (b) 1000 (c) 100000 (d) 10000
  21. 21.Which is closest to 502 × 90? (Round each number first.) (a) 450000 (b) 4500 (c) 90000 (d) 45000
  22. 22.Round 88892 to the nearest thousand.
  23. 23.Which is closest to 1800 ÷ 31? (a) 600 (b) 120 (c) 30 (d) 60
  24. 24.Which is closest to 400 + 795 + 804? (a) 1900 (b) 2200 (c) 2100 (d) 2000
  25. 25.Round 44197 to the nearest hundred.
  26. 26.Which is closest to 695 + 396 + 105? (a) 1100 (b) 1300 (c) 1400 (d) 1200
  27. 27.Which is closest to 196 + 904 + 805? (a) 1800 (b) 2000 (c) 2100 (d) 1900
  28. 28.Which is closest to 195 + 499 + 195? (a) 800 (b) 1000 (c) 900 (d) 1100
  29. 29.Which is closest to 1504 ÷ 29? (a) 500 (b) 100 (c) 25 (d) 50
  30. 30.Which is closest to 597 × 82? (Round each number first.) (a) 480000 (b) 48000 (c) 96000 (d) 4800
  31. 31.Which is closest to 198 × 68? (Round each number first.) (a) 28000 (b) 1400 (c) 14000 (d) 140000
  32. 32.Which is closest to 701 × 78? (Round each number first.) (a) 560000 (b) 5600 (c) 112000 (d) 56000
  33. 33.Round 6775 to the nearest thousand.
  34. 34.Which is closest to 1803 ÷ 21? (a) 90 (b) 900 (c) 45 (d) 180
  35. 35.Round 18533 to the nearest ten.
  36. 36.Which is closest to 195 + 302 + 295? (a) 800 (b) 700 (c) 900 (d) 1000
  37. 37.Which is closest to 798 × 19? (Round each number first.) (a) 160000 (b) 1600 (c) 32000 (d) 16000
  38. 38.Which is closest to 497 × 31? (Round each number first.) (a) 150000 (b) 15000 (c) 30000 (d) 1500
  39. 39.Which is closest to 700 + 599 + 299? (a) 1500 (b) 1700 (c) 1600 (d) 1800
  40. 40.Which is closest to 95 + 696 + 599? (a) 1600 (b) 1300 (c) 1500 (d) 1400

Answer key

  1. 1910
  2. 50
  3. 9000
  4. 1200
  5. 78100
  6. 28000
  7. 48.6
  8. 30
  9. 12000
  10. 67000
  11. 48000
  12. 23.4
  13. 49.5
  14. 60
  15. 10000
  16. 35000
  17. 1400
  18. 20
  19. 98000
  20. 10000
  21. 45000
  22. 89000
  23. 60
  24. 2000
  25. 44200
  26. 1200
  27. 1900
  28. 900
  29. 50
  30. 48000
  31. 14000
  32. 56000
  33. 7000
  34. 90
  35. 18530
  36. 800
  37. 16000
  38. 15000
  39. 1600
  40. 1400

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