← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 788 · 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 598 ÷ 31? (a) 200 (b) 40 (c) 10 (d) 20
  2. 2.Round 91.24 to one decimal place. =
  3. 3.Round 61.07 to one decimal place. =
  4. 4.Round 74758 to the nearest thousand.
  5. 5.Which is closest to 101 + 99 + 695? (a) 1000 (b) 900 (c) 1100 (d) 800
  6. 6.Which is closest to 1002 ÷ 49? (a) 40 (b) 20 (c) 200 (d) 10
  7. 7.Which is closest to 699 × 41? (Round each number first.) (a) 56000 (b) 2800 (c) 280000 (d) 28000
  8. 8.Which is closest to 399 × 68? (Round each number first.) (a) 28000 (b) 56000 (c) 280000 (d) 2800
  9. 9.Round 84445 to the nearest thousand.
  10. 10.Which is closest to 698 × 88? (Round each number first.) (a) 6300 (b) 63000 (c) 630000 (d) 126000
  11. 11.Which is closest to 807 ÷ 21? (a) 400 (b) 80 (c) 40 (d) 20
  12. 12.Which is closest to 791 ÷ 19? (a) 20 (b) 400 (c) 40 (d) 80
  13. 13.Which is closest to 97 + 102 + 796? (a) 1100 (b) 1000 (c) 900 (d) 1200
  14. 14.Which is closest to 2000 ÷ 39? (a) 500 (b) 100 (c) 50 (d) 25
  15. 15.Round 32440 to the nearest hundred.
  16. 16.Which is closest to 500 + 501 + 898? (a) 1900 (b) 1800 (c) 2000 (d) 2100
  17. 17.Which is closest to 500 × 39? (Round each number first.) (a) 200000 (b) 2000 (c) 40000 (d) 20000
  18. 18.Round 31.71 to one decimal place. =
  19. 19.Round 29.37 to one decimal place. =
  20. 20.Which is closest to 697 × 91? (Round each number first.) (a) 126000 (b) 6300 (c) 63000 (d) 630000
  21. 21.Round 57402 to the nearest ten.
  22. 22.Round 39563 to the nearest thousand.
  23. 23.Which is closest to 2395 ÷ 31? (a) 80 (b) 40 (c) 800 (d) 160
  24. 24.Which is closest to 896 + 99 + 699? (a) 1600 (b) 1900 (c) 1700 (d) 1800
  25. 25.Which is closest to 204 + 96 + 396? (a) 800 (b) 700 (c) 900 (d) 600
  26. 26.Round 18.89 to one decimal place. =
  27. 27.Which is closest to 400 ÷ 19? (a) 20 (b) 40 (c) 10 (d) 200
  28. 28.Which is closest to 196 × 80? (Round each number first.) (a) 32000 (b) 1600 (c) 16000 (d) 160000
  29. 29.Round 21.11 to one decimal place. =
  30. 30.Round 91067 to the nearest ten.
  31. 31.Which is closest to 498 × 72? (Round each number first.) (a) 350000 (b) 3500 (c) 35000 (d) 70000
  32. 32.Which is closest to 598 × 58? (Round each number first.) (a) 360000 (b) 72000 (c) 36000 (d) 3600
  33. 33.Which is closest to 898 + 297 + 396? (a) 1500 (b) 1600 (c) 1700 (d) 1800
  34. 34.Round 43783 to the nearest thousand.
  35. 35.Which is closest to 791 ÷ 21? (a) 40 (b) 20 (c) 80 (d) 400
  36. 36.Which is closest to 802 × 59? (Round each number first.) (a) 480000 (b) 96000 (c) 4800 (d) 48000
  37. 37.Round 24737 to the nearest thousand.
  38. 38.Round 81.27 to one decimal place. =
  39. 39.Which is closest to 897 + 104 + 802? (a) 2000 (b) 1900 (c) 1700 (d) 1800
  40. 40.Which is closest to 695 + 903 + 401? (a) 2100 (b) 2000 (c) 2200 (d) 1900

Answer key

  1. 20
  2. 91.2
  3. 61.1
  4. 75000
  5. 900
  6. 20
  7. 28000
  8. 28000
  9. 84000
  10. 63000
  11. 40
  12. 40
  13. 1000
  14. 50
  15. 32400
  16. 1900
  17. 20000
  18. 31.7
  19. 29.4
  20. 63000
  21. 57400
  22. 40000
  23. 80
  24. 1700
  25. 700
  26. 18.9
  27. 20
  28. 16000
  29. 21.1
  30. 91070
  31. 35000
  32. 36000
  33. 1600
  34. 44000
  35. 40
  36. 48000
  37. 25000
  38. 81.3
  39. 1800
  40. 2000

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