← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 945 · 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 197 + 195 + 101? (a) 400 (b) 600 (c) 700 (d) 500
  2. 2.Round 46.26 to one decimal place. =
  3. 3.Round 12300 to the nearest thousand.
  4. 4.Round 83.27 to one decimal place. =
  5. 5.Which is closest to 201 × 32? (Round each number first.) (a) 60000 (b) 6000 (c) 12000 (d) 600
  6. 6.Which is closest to 1507 ÷ 49? (a) 60 (b) 300 (c) 15 (d) 30
  7. 7.Which is closest to 805 + 595 + 204? (a) 1500 (b) 1700 (c) 1600 (d) 1800
  8. 8.Which is closest to 697 + 903 + 203? (a) 2000 (b) 1800 (c) 1700 (d) 1900
  9. 9.Round 38162 to the nearest hundred.
  10. 10.Which is closest to 596 + 501 + 495? (a) 1500 (b) 1800 (c) 1700 (d) 1600
  11. 11.Round 90640 to the nearest hundred.
  12. 12.Round 83.58 to one decimal place. =
  13. 13.Which is closest to 696 × 21? (Round each number first.) (a) 28000 (b) 14000 (c) 1400 (d) 140000
  14. 14.Which is closest to 3001 ÷ 51? (a) 30 (b) 600 (c) 60 (d) 120
  15. 15.Round 35.28 to one decimal place. =
  16. 16.Which is closest to 499 + 500 + 198? (a) 1100 (b) 1300 (c) 1400 (d) 1200
  17. 17.Which is closest to 705 + 804 + 696? (a) 2200 (b) 2100 (c) 2400 (d) 2300
  18. 18.Round 60.61 to one decimal place. =
  19. 19.Which is closest to 298 × 22? (Round each number first.) (a) 12000 (b) 600 (c) 60000 (d) 6000
  20. 20.Which is closest to 599 × 32? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
  21. 21.Which is closest to 502 × 18? (Round each number first.) (a) 100000 (b) 1000 (c) 20000 (d) 10000
  22. 22.Which is closest to 699 × 22? (Round each number first.) (a) 28000 (b) 1400 (c) 140000 (d) 14000
  23. 23.Which is closest to 101 + 97 + 101? (a) 300 (b) 400 (c) 500 (d) 200
  24. 24.Which is closest to 704 + 602 + 897? (a) 2100 (b) 2200 (c) 2400 (d) 2300
  25. 25.Which is closest to 201 × 59? (Round each number first.) (a) 120000 (b) 24000 (c) 12000 (d) 1200
  26. 26.Which is closest to 896 × 20? (Round each number first.) (a) 18000 (b) 180000 (c) 36000 (d) 1800
  27. 27.Which is closest to 900 + 901 + 103? (a) 1900 (b) 1800 (c) 2000 (d) 2100
  28. 28.Which is closest to 403 × 48? (Round each number first.) (a) 40000 (b) 200000 (c) 20000 (d) 2000
  29. 29.Which is closest to 795 + 595 + 396? (a) 1800 (b) 1700 (c) 1900 (d) 2000
  30. 30.Which is closest to 598 × 68? (Round each number first.) (a) 42000 (b) 84000 (c) 4200 (d) 420000
  31. 31.Round 1634 to the nearest hundred.
  32. 32.Round 20.31 to one decimal place. =
  33. 33.Which is closest to 896 × 32? (Round each number first.) (a) 270000 (b) 2700 (c) 27000 (d) 54000
  34. 34.Round 77.66 to one decimal place. =
  35. 35.Which is closest to 698 × 38? (Round each number first.) (a) 56000 (b) 28000 (c) 2800 (d) 280000
  36. 36.Which is closest to 503 + 101 + 495? (a) 1100 (b) 1300 (c) 1200 (d) 1000
  37. 37.Round 41247 to the nearest ten.
  38. 38.Round 29.88 to one decimal place. =
  39. 39.Which is closest to 798 × 19? (Round each number first.) (a) 32000 (b) 160000 (c) 16000 (d) 1600
  40. 40.Round 35.91 to one decimal place. =

Answer key

  1. 500
  2. 46.3
  3. 12000
  4. 83.3
  5. 6000
  6. 30
  7. 1600
  8. 1800
  9. 38200
  10. 1600
  11. 90600
  12. 83.6
  13. 14000
  14. 60
  15. 35.3
  16. 1200
  17. 2200
  18. 60.6
  19. 6000
  20. 18000
  21. 10000
  22. 14000
  23. 300
  24. 2200
  25. 12000
  26. 18000
  27. 1900
  28. 20000
  29. 1800
  30. 42000
  31. 1600
  32. 20.3
  33. 27000
  34. 77.7
  35. 28000
  36. 1100
  37. 41250
  38. 29.9
  39. 16000
  40. 35.9

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude