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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 838 · 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 1000 ÷ 49? (a) 10 (b) 20 (c) 40 (d) 200
  2. 2.Which is closest to 796 + 104 + 195? (a) 1000 (b) 1200 (c) 1100 (d) 1300
  3. 3.Which is closest to 904 + 199 + 300? (a) 1600 (b) 1500 (c) 1400 (d) 1300
  4. 4.Which is closest to 1993 ÷ 39? (a) 50 (b) 100 (c) 25 (d) 500
  5. 5.Which is closest to 804 ÷ 39? (a) 40 (b) 10 (c) 20 (d) 200
  6. 6.Which is closest to 3595 ÷ 41? (a) 90 (b) 45 (c) 900 (d) 180
  7. 7.Which is closest to 901 × 29? (Round each number first.) (a) 270000 (b) 2700 (c) 54000 (d) 27000
  8. 8.Which is closest to 1494 ÷ 29? (a) 100 (b) 500 (c) 25 (d) 50
  9. 9.Round 88.08 to one decimal place. =
  10. 10.Round 55265 to the nearest hundred.
  11. 11.Which is closest to 904 + 301 + 796? (a) 1900 (b) 2000 (c) 2100 (d) 2200
  12. 12.Round 43111 to the nearest thousand.
  13. 13.Which is closest to 1803 ÷ 29? (a) 120 (b) 30 (c) 600 (d) 60
  14. 14.Round 94.08 to one decimal place. =
  15. 15.Which is closest to 601 × 58? (Round each number first.) (a) 72000 (b) 36000 (c) 3600 (d) 360000
  16. 16.Which is closest to 1796 ÷ 31? (a) 60 (b) 30 (c) 120 (d) 600
  17. 17.Which is closest to 95 + 705 + 702? (a) 1400 (b) 1700 (c) 1600 (d) 1500
  18. 18.Round 27622 to the nearest ten.
  19. 19.Which is closest to 95 + 304 + 104? (a) 600 (b) 700 (c) 400 (d) 500
  20. 20.Round 94.18 to one decimal place. =
  21. 21.Round 82.69 to one decimal place. =
  22. 22.Round 74.79 to one decimal place. =
  23. 23.Round 20432 to the nearest hundred.
  24. 24.Which is closest to 696 + 697 + 495? (a) 2000 (b) 1800 (c) 2100 (d) 1900
  25. 25.Which is closest to 2396 ÷ 39? (a) 600 (b) 60 (c) 30 (d) 120
  26. 26.Which is closest to 198 + 96 + 495? (a) 1000 (b) 700 (c) 800 (d) 900
  27. 27.Which is closest to 396 + 104 + 96? (a) 500 (b) 700 (c) 800 (d) 600
  28. 28.Round 57664 to the nearest ten.
  29. 29.Which is closest to 701 × 68? (Round each number first.) (a) 4900 (b) 98000 (c) 49000 (d) 490000
  30. 30.Which is closest to 598 × 72? (Round each number first.) (a) 84000 (b) 4200 (c) 42000 (d) 420000
  31. 31.Which is closest to 401 + 500 + 202? (a) 1200 (b) 1300 (c) 1000 (d) 1100
  32. 32.Which is closest to 2397 ÷ 41? (a) 120 (b) 60 (c) 600 (d) 30
  33. 33.Round 51.41 to one decimal place. =
  34. 34.Which is closest to 1396 ÷ 21? (a) 140 (b) 35 (c) 70 (d) 700
  35. 35.Round 11.87 to one decimal place. =
  36. 36.Round 55627 to the nearest hundred.
  37. 37.Which is closest to 703 × 70? (Round each number first.) (a) 4900 (b) 490000 (c) 49000 (d) 98000
  38. 38.Which is closest to 1494 ÷ 31? (a) 50 (b) 25 (c) 100 (d) 500
  39. 39.Round 36.28 to one decimal place. =
  40. 40.Which is closest to 704 + 705 + 796? (a) 2200 (b) 2100 (c) 2400 (d) 2300

Answer key

  1. 20
  2. 1100
  3. 1400
  4. 50
  5. 20
  6. 90
  7. 27000
  8. 50
  9. 88.1
  10. 55300
  11. 2000
  12. 43000
  13. 60
  14. 94.1
  15. 36000
  16. 60
  17. 1500
  18. 27620
  19. 500
  20. 94.2
  21. 82.7
  22. 74.8
  23. 20400
  24. 1900
  25. 60
  26. 800
  27. 600
  28. 57660
  29. 49000
  30. 42000
  31. 1100
  32. 60
  33. 51.4
  34. 70
  35. 11.9
  36. 55600
  37. 49000
  38. 50
  39. 36.3
  40. 2200

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