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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 459 · 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 1196 ÷ 39? (a) 60 (b) 30 (c) 300 (d) 15
  2. 2.Round 73562 to the nearest ten.
  3. 3.Which is closest to 98 + 604 + 601? (a) 1400 (b) 1200 (c) 1300 (d) 1500
  4. 4.Which is closest to 98 + 701 + 202? (a) 1000 (b) 1200 (c) 1100 (d) 900
  5. 5.Which is closest to 498 + 601 + 403? (a) 1700 (b) 1500 (c) 1400 (d) 1600
  6. 6.Which is closest to 898 + 101 + 200? (a) 1200 (b) 1100 (c) 1400 (d) 1300
  7. 7.Round 22858 to the nearest hundred.
  8. 8.Which is closest to 304 × 62? (Round each number first.) (a) 18000 (b) 180000 (c) 36000 (d) 1800
  9. 9.Round 31330 to the nearest thousand.
  10. 10.Which is closest to 602 × 31? (Round each number first.) (a) 180000 (b) 36000 (c) 18000 (d) 1800
  11. 11.Round 17385 to the nearest thousand.
  12. 12.Round 29.53 to one decimal place. =
  13. 13.Which is closest to 197 + 295 + 700? (a) 1400 (b) 1200 (c) 1100 (d) 1300
  14. 14.Round 67691 to the nearest hundred.
  15. 15.Which is closest to 809 ÷ 41? (a) 40 (b) 10 (c) 20 (d) 200
  16. 16.Round 94.66 to one decimal place. =
  17. 17.Round 75.77 to one decimal place. =
  18. 18.Which is closest to 198 + 96 + 695? (a) 1200 (b) 1100 (c) 1000 (d) 900
  19. 19.Which is closest to 1202 ÷ 21? (a) 30 (b) 600 (c) 120 (d) 60
  20. 20.Which is closest to 95 + 905 + 898? (a) 1900 (b) 1800 (c) 2000 (d) 2100
  21. 21.Which is closest to 899 × 50? (Round each number first.) (a) 450000 (b) 4500 (c) 90000 (d) 45000
  22. 22.Round 42352 to the nearest ten.
  23. 23.Round 14248 to the nearest thousand.
  24. 24.Which is closest to 808 ÷ 19? (a) 40 (b) 80 (c) 400 (d) 20
  25. 25.Which is closest to 796 × 60? (Round each number first.) (a) 480000 (b) 48000 (c) 4800 (d) 96000
  26. 26.Round 76596 to the nearest ten.
  27. 27.Which is closest to 196 + 197 + 100? (a) 500 (b) 600 (c) 400 (d) 700
  28. 28.Which is closest to 1803 ÷ 21? (a) 90 (b) 45 (c) 180 (d) 900
  29. 29.Round 52.18 to one decimal place. =
  30. 30.Which is closest to 198 + 498 + 799? (a) 1600 (b) 1400 (c) 1700 (d) 1500
  31. 31.Which is closest to 397 × 18? (Round each number first.) (a) 80000 (b) 8000 (c) 800 (d) 16000
  32. 32.Which is closest to 895 + 400 + 95? (a) 1600 (b) 1500 (c) 1300 (d) 1400
  33. 33.Round 2895 to the nearest hundred.
  34. 34.Which is closest to 299 + 898 + 299? (a) 1600 (b) 1400 (c) 1500 (d) 1700
  35. 35.Which is closest to 901 + 800 + 399? (a) 2000 (b) 2100 (c) 2200 (d) 2300
  36. 36.Which is closest to 199 × 78? (Round each number first.) (a) 16000 (b) 160000 (c) 32000 (d) 1600
  37. 37.Round 58328 to the nearest thousand.
  38. 38.Round 65.26 to one decimal place. =
  39. 39.Which is closest to 896 + 498 + 204? (a) 1800 (b) 1600 (c) 1500 (d) 1700
  40. 40.Which is closest to 202 + 398 + 103? (a) 800 (b) 600 (c) 900 (d) 700

Answer key

  1. 30
  2. 73560
  3. 1300
  4. 1000
  5. 1500
  6. 1200
  7. 22900
  8. 18000
  9. 31000
  10. 18000
  11. 17000
  12. 29.5
  13. 1200
  14. 67700
  15. 20
  16. 94.7
  17. 75.8
  18. 1000
  19. 60
  20. 1900
  21. 45000
  22. 42350
  23. 14000
  24. 40
  25. 48000
  26. 76600
  27. 500
  28. 90
  29. 52.2
  30. 1500
  31. 8000
  32. 1400
  33. 2900
  34. 1500
  35. 2100
  36. 16000
  37. 58000
  38. 65.3
  39. 1600
  40. 700

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