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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 590 · 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 59725 to the nearest hundred.
  2. 2.Round 39530 to the nearest thousand.
  3. 3.Which is closest to 503 + 901 + 904? (a) 2200 (b) 2500 (c) 2400 (d) 2300
  4. 4.Which is closest to 1602 ÷ 19? (a) 800 (b) 160 (c) 40 (d) 80
  5. 5.Round 54632 to the nearest thousand.
  6. 6.Round 37290 to the nearest hundred.
  7. 7.Which is closest to 402 × 22? (Round each number first.) (a) 800 (b) 16000 (c) 80000 (d) 8000
  8. 8.Round 13.22 to one decimal place. =
  9. 9.Which is closest to 2095 ÷ 31? (a) 140 (b) 70 (c) 700 (d) 35
  10. 10.Which is closest to 1796 ÷ 31? (a) 30 (b) 600 (c) 120 (d) 60
  11. 11.Round 89250 to the nearest thousand.
  12. 12.Which is closest to 498 × 52? (Round each number first.) (a) 50000 (b) 250000 (c) 2500 (d) 25000
  13. 13.Which is closest to 302 × 31? (Round each number first.) (a) 900 (b) 90000 (c) 18000 (d) 9000
  14. 14.Which is closest to 100 + 103 + 700? (a) 1000 (b) 900 (c) 1100 (d) 800
  15. 15.Which is closest to 1996 ÷ 49? (a) 20 (b) 400 (c) 40 (d) 80
  16. 16.Round 91878 to the nearest ten.
  17. 17.Which is closest to 702 + 602 + 601? (a) 2100 (b) 2000 (c) 1900 (d) 1800
  18. 18.Which is closest to 807 ÷ 41? (a) 40 (b) 20 (c) 10 (d) 200
  19. 19.Round 99207 to the nearest ten.
  20. 20.Round 15.24 to one decimal place. =
  21. 21.Round 99.07 to one decimal place. =
  22. 22.Round 82.48 to one decimal place. =
  23. 23.Round 76712 to the nearest ten.
  24. 24.Which is closest to 698 + 295 + 295? (a) 1200 (b) 1400 (c) 1500 (d) 1300
  25. 25.Which is closest to 700 × 71? (Round each number first.) (a) 490000 (b) 98000 (c) 4900 (d) 49000
  26. 26.Round 23.57 to one decimal place. =
  27. 27.Which is closest to 397 ÷ 19? (a) 40 (b) 200 (c) 20 (d) 10
  28. 28.Round 19.47 to one decimal place. =
  29. 29.Round 53286 to the nearest ten.
  30. 30.Which is closest to 700 + 296 + 405? (a) 1300 (b) 1400 (c) 1600 (d) 1500
  31. 31.Which is closest to 598 + 98 + 900? (a) 1700 (b) 1600 (c) 1500 (d) 1800
  32. 32.Which is closest to 2394 ÷ 31? (a) 80 (b) 800 (c) 160 (d) 40
  33. 33.Round 64190 to the nearest hundred.
  34. 34.Which is closest to 299 + 698 + 495? (a) 1700 (b) 1500 (c) 1600 (d) 1400
  35. 35.Which is closest to 200 × 81? (Round each number first.) (a) 32000 (b) 16000 (c) 160000 (d) 1600
  36. 36.Round 48721 to the nearest hundred.
  37. 37.Which is closest to 1494 ÷ 49? (a) 15 (b) 30 (c) 300 (d) 60
  38. 38.Round 57136 to the nearest thousand.
  39. 39.Round 1263 to the nearest ten.
  40. 40.Which is closest to 796 × 58? (Round each number first.) (a) 4800 (b) 96000 (c) 480000 (d) 48000

Answer key

  1. 59700
  2. 40000
  3. 2300
  4. 80
  5. 55000
  6. 37300
  7. 8000
  8. 13.2
  9. 70
  10. 60
  11. 89000
  12. 25000
  13. 9000
  14. 900
  15. 40
  16. 91880
  17. 1900
  18. 20
  19. 99210
  20. 15.2
  21. 99.1
  22. 82.5
  23. 76710
  24. 1300
  25. 49000
  26. 23.6
  27. 20
  28. 19.5
  29. 53290
  30. 1400
  31. 1600
  32. 80
  33. 64200
  34. 1500
  35. 16000
  36. 48700
  37. 30
  38. 57000
  39. 1260
  40. 48000

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