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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 774 · 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 398 + 798 + 199? (a) 1600 (b) 1500 (c) 1300 (d) 1400
  2. 2.Which is closest to 1202 ÷ 29? (a) 400 (b) 80 (c) 40 (d) 20
  3. 3.Round 83814 to the nearest hundred.
  4. 4.Round 16082 to the nearest hundred.
  5. 5.Which is closest to 1197 ÷ 31? (a) 20 (b) 40 (c) 80 (d) 400
  6. 6.Which is closest to 98 + 302 + 299? (a) 600 (b) 900 (c) 800 (d) 700
  7. 7.Which is closest to 504 + 403 + 397? (a) 1300 (b) 1200 (c) 1400 (d) 1500
  8. 8.Which is closest to 904 × 61? (Round each number first.) (a) 108000 (b) 540000 (c) 5400 (d) 54000
  9. 9.Which is closest to 399 × 28? (Round each number first.) (a) 1200 (b) 24000 (c) 120000 (d) 12000
  10. 10.Which is closest to 104 + 695 + 698? (a) 1600 (b) 1500 (c) 1400 (d) 1700
  11. 11.Round 42.48 to one decimal place. =
  12. 12.Which is closest to 1205 ÷ 39? (a) 60 (b) 300 (c) 30 (d) 15
  13. 13.Round 11.22 to one decimal place. =
  14. 14.Round 81.61 to one decimal place. =
  15. 15.Round 99.67 to one decimal place. =
  16. 16.Which is closest to 600 + 398 + 803? (a) 1700 (b) 2000 (c) 1800 (d) 1900
  17. 17.Which is closest to 1207 ÷ 41? (a) 300 (b) 15 (c) 60 (d) 30
  18. 18.Round 85.06 to one decimal place. =
  19. 19.Which is closest to 98 + 603 + 400? (a) 1300 (b) 1200 (c) 1100 (d) 1000
  20. 20.Which is closest to 2804 ÷ 39? (a) 35 (b) 70 (c) 140 (d) 700
  21. 21.Round 80683 to the nearest ten.
  22. 22.Round 64.87 to one decimal place. =
  23. 23.Round 72.81 to one decimal place. =
  24. 24.Which is closest to 302 × 40? (Round each number first.) (a) 12000 (b) 120000 (c) 24000 (d) 1200
  25. 25.Which is closest to 799 + 196 + 196? (a) 1200 (b) 1300 (c) 1400 (d) 1100
  26. 26.Round 29.82 to one decimal place. =
  27. 27.Which is closest to 203 × 31? (Round each number first.) (a) 600 (b) 6000 (c) 12000 (d) 60000
  28. 28.Round 38327 to the nearest hundred.
  29. 29.Round 64926 to the nearest thousand.
  30. 30.Which is closest to 697 + 101 + 696? (a) 1600 (b) 1400 (c) 1700 (d) 1500
  31. 31.Which is closest to 198 × 30? (Round each number first.) (a) 600 (b) 12000 (c) 6000 (d) 60000
  32. 32.Round 13938 to the nearest thousand.
  33. 33.Round 45644 to the nearest thousand.
  34. 34.Round 57.33 to one decimal place. =
  35. 35.Which is closest to 196 + 203 + 896? (a) 1500 (b) 1400 (c) 1300 (d) 1200
  36. 36.Round 84846 to the nearest ten.
  37. 37.Which is closest to 602 + 400 + 505? (a) 1500 (b) 1600 (c) 1700 (d) 1400
  38. 38.Which is closest to 1802 ÷ 19? (a) 180 (b) 90 (c) 45 (d) 900
  39. 39.Round 22.46 to one decimal place. =
  40. 40.Which is closest to 3001 ÷ 49? (a) 30 (b) 60 (c) 120 (d) 600

Answer key

  1. 1400
  2. 40
  3. 83800
  4. 16100
  5. 40
  6. 700
  7. 1300
  8. 54000
  9. 12000
  10. 1500
  11. 42.5
  12. 30
  13. 11.2
  14. 81.6
  15. 99.7
  16. 1800
  17. 30
  18. 85.1
  19. 1100
  20. 70
  21. 80680
  22. 64.9
  23. 72.8
  24. 12000
  25. 1200
  26. 29.8
  27. 6000
  28. 38300
  29. 65000
  30. 1500
  31. 6000
  32. 14000
  33. 46000
  34. 57.3
  35. 1300
  36. 84850
  37. 1500
  38. 90
  39. 22.5
  40. 60

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