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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 213 · 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 895 + 98 + 396? (a) 1400 (b) 1500 (c) 1600 (d) 1300
  2. 2.Round 39999 to the nearest hundred.
  3. 3.Round 60378 to the nearest ten.
  4. 4.Which is closest to 3601 ÷ 39? (a) 90 (b) 900 (c) 45 (d) 180
  5. 5.Round 23.33 to one decimal place. =
  6. 6.Which is closest to 2992 ÷ 51? (a) 600 (b) 60 (c) 120 (d) 30
  7. 7.Round 24487 to the nearest hundred.
  8. 8.Which is closest to 297 + 905 + 195? (a) 1500 (b) 1600 (c) 1300 (d) 1400
  9. 9.Which is closest to 96 + 495 + 799? (a) 1600 (b) 1500 (c) 1300 (d) 1400
  10. 10.Which is closest to 199 + 905 + 196? (a) 1200 (b) 1500 (c) 1300 (d) 1400
  11. 11.Round 34334 to the nearest ten.
  12. 12.Round 55435 to the nearest thousand.
  13. 13.Round 90.78 to one decimal place. =
  14. 14.Which is closest to 298 × 60? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
  15. 15.Round 42935 to the nearest thousand.
  16. 16.Round 8927 to the nearest thousand.
  17. 17.Which is closest to 200 × 48? (Round each number first.) (a) 1000 (b) 10000 (c) 100000 (d) 20000
  18. 18.Round 71.32 to one decimal place. =
  19. 19.Round 82536 to the nearest ten.
  20. 20.Round 23.47 to one decimal place. =
  21. 21.Round 18.19 to one decimal place. =
  22. 22.Which is closest to 3592 ÷ 41? (a) 900 (b) 180 (c) 45 (d) 90
  23. 23.Which is closest to 402 + 198 + 502? (a) 1300 (b) 1000 (c) 1100 (d) 1200
  24. 24.Which is closest to 505 + 499 + 401? (a) 1400 (b) 1500 (c) 1300 (d) 1600
  25. 25.Which is closest to 3607 ÷ 41? (a) 900 (b) 180 (c) 90 (d) 45
  26. 26.Which is closest to 3002 ÷ 49? (a) 600 (b) 60 (c) 30 (d) 120
  27. 27.Round 78056 to the nearest ten.
  28. 28.Round 32652 to the nearest ten.
  29. 29.Which is closest to 101 + 203 + 201? (a) 500 (b) 700 (c) 600 (d) 400
  30. 30.Which is closest to 602 × 62? (Round each number first.) (a) 3600 (b) 36000 (c) 360000 (d) 72000
  31. 31.Which is closest to 1009 ÷ 51? (a) 200 (b) 40 (c) 20 (d) 10
  32. 32.Which is closest to 899 + 803 + 202? (a) 1800 (b) 2000 (c) 2100 (d) 1900
  33. 33.Which is closest to 808 ÷ 39? (a) 10 (b) 20 (c) 200 (d) 40
  34. 34.Round 45.24 to one decimal place. =
  35. 35.Which is closest to 798 × 50? (Round each number first.) (a) 4000 (b) 80000 (c) 40000 (d) 400000
  36. 36.Which is closest to 4003 ÷ 51? (a) 80 (b) 160 (c) 40 (d) 800
  37. 37.Round 41783 to the nearest hundred.
  38. 38.Which is closest to 595 ÷ 19? (a) 15 (b) 300 (c) 30 (d) 60
  39. 39.Round 66321 to the nearest ten.
  40. 40.Which is closest to 401 × 39? (Round each number first.) (a) 160000 (b) 1600 (c) 32000 (d) 16000

Answer key

  1. 1400
  2. 40000
  3. 60380
  4. 90
  5. 23.3
  6. 60
  7. 24500
  8. 1400
  9. 1400
  10. 1300
  11. 34330
  12. 55000
  13. 90.8
  14. 18000
  15. 43000
  16. 9000
  17. 10000
  18. 71.3
  19. 82540
  20. 23.5
  21. 18.2
  22. 90
  23. 1100
  24. 1400
  25. 90
  26. 60
  27. 78060
  28. 32650
  29. 500
  30. 36000
  31. 20
  32. 1900
  33. 20
  34. 45.2
  35. 40000
  36. 80
  37. 41800
  38. 30
  39. 66320
  40. 16000

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