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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 537 · 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 701 + 704 + 795? (a) 2400 (b) 2100 (c) 2200 (d) 2300
  2. 2.Round 37884 to the nearest thousand.
  3. 3.Which is closest to 3198 ÷ 39? (a) 800 (b) 80 (c) 160 (d) 40
  4. 4.Round 1741 to the nearest hundred.
  5. 5.Which is closest to 400 + 603 + 801? (a) 1700 (b) 1900 (c) 2000 (d) 1800
  6. 6.Round 26.16 to one decimal place. =
  7. 7.Round 65346 to the nearest ten.
  8. 8.Round 47619 to the nearest ten.
  9. 9.Round 26284 to the nearest ten.
  10. 10.Round 45624 to the nearest ten.
  11. 11.Which is closest to 196 + 898 + 604? (a) 1800 (b) 1700 (c) 1600 (d) 1900
  12. 12.Which is closest to 2004 ÷ 39? (a) 100 (b) 50 (c) 500 (d) 25
  13. 13.Which is closest to 802 ÷ 21? (a) 20 (b) 80 (c) 400 (d) 40
  14. 14.Round 46.68 to one decimal place. =
  15. 15.Round 37103 to the nearest thousand.
  16. 16.Which is closest to 804 + 497 + 205? (a) 1700 (b) 1500 (c) 1400 (d) 1600
  17. 17.Which is closest to 303 × 20? (Round each number first.) (a) 12000 (b) 600 (c) 6000 (d) 60000
  18. 18.Which is closest to 499 × 92? (Round each number first.) (a) 45000 (b) 4500 (c) 90000 (d) 450000
  19. 19.Which is closest to 703 × 39? (Round each number first.) (a) 280000 (b) 28000 (c) 2800 (d) 56000
  20. 20.Round 15783 to the nearest ten.
  21. 21.Which is closest to 401 × 62? (Round each number first.) (a) 2400 (b) 48000 (c) 240000 (d) 24000
  22. 22.Round 71.93 to one decimal place. =
  23. 23.Which is closest to 1607 ÷ 21? (a) 80 (b) 160 (c) 800 (d) 40
  24. 24.Round 3429 to the nearest thousand.
  25. 25.Which is closest to 595 + 195 + 597? (a) 1300 (b) 1500 (c) 1600 (d) 1400
  26. 26.Round 67.17 to one decimal place. =
  27. 27.Which is closest to 404 ÷ 19? (a) 20 (b) 40 (c) 10 (d) 200
  28. 28.Round 28779 to the nearest hundred.
  29. 29.Round 21.48 to one decimal place. =
  30. 30.Round 27.92 to one decimal place. =
  31. 31.Which is closest to 602 ÷ 31? (a) 40 (b) 20 (c) 200 (d) 10
  32. 32.Which is closest to 296 + 902 + 697? (a) 1800 (b) 1900 (c) 2100 (d) 2000
  33. 33.Which is closest to 898 + 499 + 98? (a) 1400 (b) 1700 (c) 1500 (d) 1600
  34. 34.Which is closest to 97 + 402 + 400? (a) 1100 (b) 900 (c) 1000 (d) 800
  35. 35.Round 67.67 to one decimal place. =
  36. 36.Which is closest to 1504 ÷ 49? (a) 15 (b) 60 (c) 30 (d) 300
  37. 37.Which is closest to 902 + 605 + 201? (a) 1600 (b) 1900 (c) 1700 (d) 1800
  38. 38.Which is closest to 1208 ÷ 39? (a) 60 (b) 15 (c) 300 (d) 30
  39. 39.Round 29.21 to one decimal place. =
  40. 40.Round 16826 to the nearest ten.

Answer key

  1. 2200
  2. 38000
  3. 80
  4. 1700
  5. 1800
  6. 26.2
  7. 65350
  8. 47620
  9. 26280
  10. 45620
  11. 1700
  12. 50
  13. 40
  14. 46.7
  15. 37000
  16. 1500
  17. 6000
  18. 45000
  19. 28000
  20. 15780
  21. 24000
  22. 71.9
  23. 80
  24. 3000
  25. 1400
  26. 67.2
  27. 20
  28. 28800
  29. 21.5
  30. 27.9
  31. 20
  32. 1900
  33. 1500
  34. 900
  35. 67.7
  36. 30
  37. 1700
  38. 30
  39. 29.2
  40. 16830

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