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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 463 · 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.Round 37.48 to one decimal place. =
  2. 2.Which is closest to 899 + 899 + 895? (a) 2600 (b) 2800 (c) 2700 (d) 2900
  3. 3.Round 68.49 to one decimal place. =
  4. 4.Round 84.12 to one decimal place. =
  5. 5.Which is closest to 4501 ÷ 49? (a) 90 (b) 900 (c) 180 (d) 45
  6. 6.Round 39.16 to one decimal place. =
  7. 7.Which is closest to 195 + 604 + 705? (a) 1700 (b) 1400 (c) 1600 (d) 1500
  8. 8.Round 36.68 to one decimal place. =
  9. 9.Round 46331 to the nearest hundred.
  10. 10.Which is closest to 399 × 38? (Round each number first.) (a) 160000 (b) 1600 (c) 16000 (d) 32000
  11. 11.Which is closest to 1192 ÷ 39? (a) 30 (b) 15 (c) 60 (d) 300
  12. 12.Which is closest to 1401 ÷ 19? (a) 70 (b) 35 (c) 140 (d) 700
  13. 13.Round 35675 to the nearest hundred.
  14. 14.Which is closest to 595 ÷ 19? (a) 30 (b) 15 (c) 60 (d) 300
  15. 15.Which is closest to 798 × 21? (Round each number first.) (a) 32000 (b) 160000 (c) 1600 (d) 16000
  16. 16.Which is closest to 1006 ÷ 51? (a) 200 (b) 10 (c) 40 (d) 20
  17. 17.Which is closest to 604 ÷ 29? (a) 40 (b) 20 (c) 10 (d) 200
  18. 18.Round 85150 to the nearest thousand.
  19. 19.Round 99.77 to one decimal place. =
  20. 20.Round 71.53 to one decimal place. =
  21. 21.Which is closest to 199 + 595 + 904? (a) 1700 (b) 1800 (c) 1600 (d) 1900
  22. 22.Which is closest to 2498 ÷ 49? (a) 100 (b) 500 (c) 25 (d) 50
  23. 23.Round 11.22 to one decimal place. =
  24. 24.Which is closest to 696 × 19? (Round each number first.) (a) 140000 (b) 1400 (c) 28000 (d) 14000
  25. 25.Round 80065 to the nearest hundred.
  26. 26.Which is closest to 703 × 38? (Round each number first.) (a) 28000 (b) 2800 (c) 280000 (d) 56000
  27. 27.Which is closest to 97 + 100 + 802? (a) 1100 (b) 900 (c) 1000 (d) 1200
  28. 28.Round 46.58 to one decimal place. =
  29. 29.Round 89453 to the nearest thousand.
  30. 30.Round 34756 to the nearest ten.
  31. 31.Round 21288 to the nearest ten.
  32. 32.Round 66.27 to one decimal place. =
  33. 33.Which is closest to 3992 ÷ 49? (a) 160 (b) 800 (c) 40 (d) 80
  34. 34.Which is closest to 603 ÷ 19? (a) 30 (b) 15 (c) 300 (d) 60
  35. 35.Which is closest to 201 + 797 + 703? (a) 1800 (b) 1900 (c) 1700 (d) 1600
  36. 36.Round 66794 to the nearest thousand.
  37. 37.Which is closest to 696 × 69? (Round each number first.) (a) 98000 (b) 49000 (c) 4900 (d) 490000
  38. 38.Which is closest to 3207 ÷ 39? (a) 800 (b) 40 (c) 160 (d) 80
  39. 39.Which is closest to 602 × 80? (Round each number first.) (a) 4800 (b) 48000 (c) 480000 (d) 96000
  40. 40.Round 86572 to the nearest hundred.

Answer key

  1. 37.5
  2. 2700
  3. 68.5
  4. 84.1
  5. 90
  6. 39.2
  7. 1500
  8. 36.7
  9. 46300
  10. 16000
  11. 30
  12. 70
  13. 35700
  14. 30
  15. 16000
  16. 20
  17. 20
  18. 85000
  19. 99.8
  20. 71.5
  21. 1700
  22. 50
  23. 11.2
  24. 14000
  25. 80100
  26. 28000
  27. 1000
  28. 46.6
  29. 89000
  30. 34760
  31. 21290
  32. 66.3
  33. 80
  34. 30
  35. 1700
  36. 67000
  37. 49000
  38. 80
  39. 48000
  40. 86600

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