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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 365 · 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 601 + 402 + 900? (a) 1800 (b) 2000 (c) 1900 (d) 2100
  2. 2.Round 46.23 to one decimal place. =
  3. 3.Round 52644 to the nearest hundred.
  4. 4.Which is closest to 2392 ÷ 39? (a) 30 (b) 60 (c) 600 (d) 120
  5. 5.Round 82.16 to one decimal place. =
  6. 6.Round 64426 to the nearest ten.
  7. 7.Which is closest to 798 + 97 + 201? (a) 1100 (b) 1300 (c) 1000 (d) 1200
  8. 8.Which is closest to 996 ÷ 49? (a) 40 (b) 10 (c) 20 (d) 200
  9. 9.Round 71.44 to one decimal place. =
  10. 10.Round 42394 to the nearest hundred.
  11. 11.Round 77935 to the nearest hundred.
  12. 12.Which is closest to 199 × 20? (Round each number first.) (a) 40000 (b) 8000 (c) 4000 (d) 400
  13. 13.Round 15.83 to one decimal place. =
  14. 14.Which is closest to 898 + 801 + 595? (a) 2300 (b) 2500 (c) 2400 (d) 2200
  15. 15.Round 10594 to the nearest thousand.
  16. 16.Which is closest to 296 + 597 + 103? (a) 1200 (b) 900 (c) 1000 (d) 1100
  17. 17.Which is closest to 2394 ÷ 31? (a) 80 (b) 800 (c) 160 (d) 40
  18. 18.Round 51.19 to one decimal place. =
  19. 19.Round 67.47 to one decimal place. =
  20. 20.Which is closest to 195 + 100 + 104? (a) 300 (b) 400 (c) 500 (d) 600
  21. 21.Round 69.88 to one decimal place. =
  22. 22.Which is closest to 997 ÷ 49? (a) 200 (b) 10 (c) 40 (d) 20
  23. 23.Which is closest to 596 ÷ 19? (a) 60 (b) 15 (c) 300 (d) 30
  24. 24.Round 27.59 to one decimal place. =
  25. 25.Round 29861 to the nearest ten.
  26. 26.Round 63.53 to one decimal place. =
  27. 27.Round 64297 to the nearest thousand.
  28. 28.Round 85.69 to one decimal place. =
  29. 29.Round 28812 to the nearest hundred.
  30. 30.Which is closest to 401 + 303 + 100? (a) 1000 (b) 900 (c) 700 (d) 800
  31. 31.Which is closest to 196 + 301 + 300? (a) 800 (b) 1000 (c) 700 (d) 900
  32. 32.Round 84.43 to one decimal place. =
  33. 33.Which is closest to 904 × 59? (Round each number first.) (a) 5400 (b) 540000 (c) 54000 (d) 108000
  34. 34.Round 83.64 to one decimal place. =
  35. 35.Round 31.16 to one decimal place. =
  36. 36.Round 59.27 to one decimal place. =
  37. 37.Round 55.56 to one decimal place. =
  38. 38.Which is closest to 399 × 21? (Round each number first.) (a) 800 (b) 8000 (c) 16000 (d) 80000
  39. 39.Round 22272 to the nearest thousand.
  40. 40.Which is closest to 1609 ÷ 39? (a) 400 (b) 20 (c) 80 (d) 40

Answer key

  1. 1900
  2. 46.2
  3. 52600
  4. 60
  5. 82.2
  6. 64430
  7. 1100
  8. 20
  9. 71.4
  10. 42400
  11. 77900
  12. 4000
  13. 15.8
  14. 2300
  15. 11000
  16. 1000
  17. 80
  18. 51.2
  19. 67.5
  20. 400
  21. 69.9
  22. 20
  23. 30
  24. 27.6
  25. 29860
  26. 63.5
  27. 64000
  28. 85.7
  29. 28800
  30. 800
  31. 800
  32. 84.4
  33. 54000
  34. 83.6
  35. 31.2
  36. 59.3
  37. 55.6
  38. 8000
  39. 22000
  40. 40

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