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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 113 · 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 98 + 201 + 803? (a) 1200 (b) 1100 (c) 1000 (d) 1300
  2. 2.Round 19.59 to one decimal place. =
  3. 3.Which is closest to 2705 ÷ 29? (a) 180 (b) 45 (c) 900 (d) 90
  4. 4.Which is closest to 503 × 69? (Round each number first.) (a) 3500 (b) 35000 (c) 350000 (d) 70000
  5. 5.Which is closest to 301 + 202 + 795? (a) 1500 (b) 1300 (c) 1200 (d) 1400
  6. 6.Round 32.27 to one decimal place. =
  7. 7.Round 4884 to the nearest hundred.
  8. 8.Round 51635 to the nearest thousand.
  9. 9.Which is closest to 496 + 798 + 196? (a) 1700 (b) 1400 (c) 1600 (d) 1500
  10. 10.Round 26.94 to one decimal place. =
  11. 11.Which is closest to 698 × 81? (Round each number first.) (a) 112000 (b) 5600 (c) 560000 (d) 56000
  12. 12.Round 11051 to the nearest thousand.
  13. 13.Which is closest to 804 ÷ 39? (a) 200 (b) 40 (c) 10 (d) 20
  14. 14.Which is closest to 299 × 90? (Round each number first.) (a) 27000 (b) 270000 (c) 54000 (d) 2700
  15. 15.Which is closest to 2409 ÷ 41? (a) 600 (b) 120 (c) 60 (d) 30
  16. 16.Which is closest to 391 ÷ 19? (a) 200 (b) 20 (c) 10 (d) 40
  17. 17.Which is closest to 397 + 602 + 296? (a) 1500 (b) 1400 (c) 1300 (d) 1200
  18. 18.Which is closest to 603 + 103 + 698? (a) 1300 (b) 1500 (c) 1400 (d) 1600
  19. 19.Round 37575 to the nearest thousand.
  20. 20.Which is closest to 2505 ÷ 49? (a) 100 (b) 500 (c) 50 (d) 25
  21. 21.Round 47841 to the nearest hundred.
  22. 22.Which is closest to 195 + 699 + 697? (a) 1600 (b) 1500 (c) 1800 (d) 1700
  23. 23.Round 55884 to the nearest ten.
  24. 24.Round 46.19 to one decimal place. =
  25. 25.Round 51.56 to one decimal place. =
  26. 26.Which is closest to 2397 ÷ 29? (a) 40 (b) 800 (c) 160 (d) 80
  27. 27.Round 11221 to the nearest ten.
  28. 28.Which is closest to 896 ÷ 31? (a) 30 (b) 60 (c) 300 (d) 15
  29. 29.Round 83680 to the nearest thousand.
  30. 30.Round 47.94 to one decimal place. =
  31. 31.Which is closest to 2392 ÷ 31? (a) 800 (b) 160 (c) 40 (d) 80
  32. 32.Which is closest to 992 ÷ 49? (a) 200 (b) 10 (c) 20 (d) 40
  33. 33.Which is closest to 605 + 98 + 696? (a) 1500 (b) 1600 (c) 1400 (d) 1300
  34. 34.Round 78.37 to one decimal place. =
  35. 35.Round 60963 to the nearest thousand.
  36. 36.Which is closest to 704 + 700 + 102? (a) 1600 (b) 1700 (c) 1500 (d) 1400
  37. 37.Round 70.24 to one decimal place. =
  38. 38.Round 59.76 to one decimal place. =
  39. 39.Round 35.43 to one decimal place. =
  40. 40.Which is closest to 2797 ÷ 39? (a) 35 (b) 70 (c) 140 (d) 700

Answer key

  1. 1100
  2. 19.6
  3. 90
  4. 35000
  5. 1300
  6. 32.3
  7. 4900
  8. 52000
  9. 1500
  10. 26.9
  11. 56000
  12. 11000
  13. 20
  14. 27000
  15. 60
  16. 20
  17. 1300
  18. 1400
  19. 38000
  20. 50
  21. 47800
  22. 1600
  23. 55880
  24. 46.2
  25. 51.6
  26. 80
  27. 11220
  28. 30
  29. 84000
  30. 47.9
  31. 80
  32. 20
  33. 1400
  34. 78.4
  35. 61000
  36. 1500
  37. 70.2
  38. 59.8
  39. 35.4
  40. 70

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