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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 193 · 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 1204 ÷ 39? (a) 60 (b) 300 (c) 15 (d) 30
  2. 2.Which is closest to 1596 ÷ 41? (a) 40 (b) 400 (c) 80 (d) 20
  3. 3.Which is closest to 702 × 50? (Round each number first.) (a) 35000 (b) 350000 (c) 3500 (d) 70000
  4. 4.Which is closest to 3599 ÷ 39? (a) 90 (b) 180 (c) 45 (d) 900
  5. 5.Which is closest to 303 × 68? (Round each number first.) (a) 2100 (b) 21000 (c) 210000 (d) 42000
  6. 6.Round 65191 to the nearest hundred.
  7. 7.Which is closest to 300 + 598 + 395? (a) 1400 (b) 1200 (c) 1500 (d) 1300
  8. 8.Round 99896 to the nearest thousand.
  9. 9.Which is closest to 495 + 595 + 199? (a) 1300 (b) 1400 (c) 1500 (d) 1200
  10. 10.Which is closest to 1791 ÷ 31? (a) 120 (b) 30 (c) 600 (d) 60
  11. 11.Round 88947 to the nearest ten.
  12. 12.Which is closest to 797 × 40? (Round each number first.) (a) 32000 (b) 320000 (c) 64000 (d) 3200
  13. 13.Round 43.89 to one decimal place. =
  14. 14.Round 19.43 to one decimal place. =
  15. 15.Round 13.28 to one decimal place. =
  16. 16.Which is closest to 699 × 69? (Round each number first.) (a) 4900 (b) 49000 (c) 98000 (d) 490000
  17. 17.Which is closest to 698 + 805 + 502? (a) 2200 (b) 1900 (c) 2100 (d) 2000
  18. 18.Which is closest to 1191 ÷ 41? (a) 300 (b) 60 (c) 30 (d) 15
  19. 19.Which is closest to 400 × 69? (Round each number first.) (a) 2800 (b) 56000 (c) 280000 (d) 28000
  20. 20.Which is closest to 3592 ÷ 41? (a) 900 (b) 90 (c) 180 (d) 45
  21. 21.Round 43380 to the nearest hundred.
  22. 22.Which is closest to 499 + 598 + 905? (a) 1900 (b) 2100 (c) 2200 (d) 2000
  23. 23.Which is closest to 701 × 68? (Round each number first.) (a) 49000 (b) 490000 (c) 98000 (d) 4900
  24. 24.Round 46552 to the nearest hundred.
  25. 25.Which is closest to 1000 ÷ 49? (a) 40 (b) 200 (c) 10 (d) 20
  26. 26.Which is closest to 2003 ÷ 51? (a) 400 (b) 20 (c) 40 (d) 80
  27. 27.Round 64479 to the nearest ten.
  28. 28.Round 7204 to the nearest thousand.
  29. 29.Round 40.08 to one decimal place. =
  30. 30.Round 44395 to the nearest thousand.
  31. 31.Which is closest to 101 + 597 + 298? (a) 1100 (b) 900 (c) 1200 (d) 1000
  32. 32.Which is closest to 204 × 29? (Round each number first.) (a) 6000 (b) 60000 (c) 12000 (d) 600
  33. 33.Round 72681 to the nearest thousand.
  34. 34.Round 31.22 to one decimal place. =
  35. 35.Which is closest to 898 × 32? (Round each number first.) (a) 2700 (b) 270000 (c) 54000 (d) 27000
  36. 36.Which is closest to 301 × 79? (Round each number first.) (a) 2400 (b) 240000 (c) 24000 (d) 48000
  37. 37.Round 41.53 to one decimal place. =
  38. 38.Which is closest to 702 × 70? (Round each number first.) (a) 49000 (b) 4900 (c) 98000 (d) 490000
  39. 39.Which is closest to 2496 ÷ 51? (a) 50 (b) 500 (c) 25 (d) 100
  40. 40.Round 88631 to the nearest hundred.

Answer key

  1. 30
  2. 40
  3. 35000
  4. 90
  5. 21000
  6. 65200
  7. 1300
  8. 100000
  9. 1300
  10. 60
  11. 88950
  12. 32000
  13. 43.9
  14. 19.4
  15. 13.3
  16. 49000
  17. 2000
  18. 30
  19. 28000
  20. 90
  21. 43400
  22. 2000
  23. 49000
  24. 46600
  25. 20
  26. 40
  27. 64480
  28. 7000
  29. 40.1
  30. 44000
  31. 1000
  32. 6000
  33. 73000
  34. 31.2
  35. 27000
  36. 24000
  37. 41.5
  38. 49000
  39. 50
  40. 88600

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