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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 38 · 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 98.86 to one decimal place. =
  2. 2.Which is closest to 3596 ÷ 39? (a) 180 (b) 900 (c) 90 (d) 45
  3. 3.Round 6916 to the nearest ten.
  4. 4.Which is closest to 2809 ÷ 39? (a) 70 (b) 700 (c) 140 (d) 35
  5. 5.Which is closest to 495 + 99 + 205? (a) 1000 (b) 900 (c) 700 (d) 800
  6. 6.Round 36464 to the nearest thousand.
  7. 7.Round 17.08 to one decimal place. =
  8. 8.Which is closest to 3192 ÷ 41? (a) 160 (b) 800 (c) 40 (d) 80
  9. 9.Which is closest to 904 × 70? (Round each number first.) (a) 63000 (b) 630000 (c) 126000 (d) 6300
  10. 10.Round 10.26 to one decimal place. =
  11. 11.Which is closest to 803 × 28? (Round each number first.) (a) 24000 (b) 48000 (c) 2400 (d) 240000
  12. 12.Which is closest to 396 + 705 + 500? (a) 1600 (b) 1500 (c) 1800 (d) 1700
  13. 13.Round 27476 to the nearest thousand.
  14. 14.Round 32.14 to one decimal place. =
  15. 15.Which is closest to 1393 ÷ 19? (a) 700 (b) 140 (c) 70 (d) 35
  16. 16.Round 62079 to the nearest hundred.
  17. 17.Round 23875 to the nearest hundred.
  18. 18.Which is closest to 499 + 201 + 499? (a) 1400 (b) 1300 (c) 1100 (d) 1200
  19. 19.Which is closest to 396 × 78? (Round each number first.) (a) 3200 (b) 64000 (c) 32000 (d) 320000
  20. 20.Which is closest to 2092 ÷ 29? (a) 70 (b) 700 (c) 35 (d) 140
  21. 21.Round 95581 to the nearest hundred.
  22. 22.Which is closest to 499 + 397 + 504? (a) 1400 (b) 1500 (c) 1300 (d) 1600
  23. 23.Which is closest to 301 + 501 + 798? (a) 1700 (b) 1800 (c) 1600 (d) 1500
  24. 24.Round 67.32 to one decimal place. =
  25. 25.Which is closest to 895 + 595 + 805? (a) 2400 (b) 2200 (c) 2300 (d) 2500
  26. 26.Round 60.48 to one decimal place. =
  27. 27.Round 20526 to the nearest ten.
  28. 28.Which is closest to 1507 ÷ 49? (a) 15 (b) 60 (c) 300 (d) 30
  29. 29.Which is closest to 304 × 32? (Round each number first.) (a) 90000 (b) 18000 (c) 900 (d) 9000
  30. 30.Which is closest to 397 + 298 + 797? (a) 1700 (b) 1500 (c) 1600 (d) 1400
  31. 31.Which is closest to 1595 ÷ 19? (a) 40 (b) 800 (c) 160 (d) 80
  32. 32.Which is closest to 203 × 59? (Round each number first.) (a) 12000 (b) 120000 (c) 24000 (d) 1200
  33. 33.Round 11600 to the nearest thousand.
  34. 34.Which is closest to 502 × 81? (Round each number first.) (a) 40000 (b) 80000 (c) 4000 (d) 400000
  35. 35.Round 10297 to the nearest hundred.
  36. 36.Which is closest to 197 × 79? (Round each number first.) (a) 16000 (b) 160000 (c) 1600 (d) 32000
  37. 37.Which is closest to 795 + 700 + 97? (a) 1800 (b) 1700 (c) 1500 (d) 1600
  38. 38.Which is closest to 202 + 97 + 695? (a) 900 (b) 1000 (c) 1100 (d) 1200
  39. 39.Which is closest to 597 × 72? (Round each number first.) (a) 4200 (b) 84000 (c) 42000 (d) 420000
  40. 40.Round 44.22 to one decimal place. =

Answer key

  1. 98.9
  2. 90
  3. 6920
  4. 70
  5. 800
  6. 36000
  7. 17.1
  8. 80
  9. 63000
  10. 10.3
  11. 24000
  12. 1600
  13. 27000
  14. 32.1
  15. 70
  16. 62100
  17. 23900
  18. 1200
  19. 32000
  20. 70
  21. 95600
  22. 1400
  23. 1600
  24. 67.3
  25. 2300
  26. 60.5
  27. 20530
  28. 30
  29. 9000
  30. 1500
  31. 80
  32. 12000
  33. 12000
  34. 40000
  35. 10300
  36. 16000
  37. 1600
  38. 1000
  39. 42000
  40. 44.2

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