← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 966 · 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 297 × 32? (Round each number first.) (a) 9000 (b) 18000 (c) 900 (d) 90000
  2. 2.Round 29.61 to one decimal place. =
  3. 3.Round 85.84 to one decimal place. =
  4. 4.Round 16.06 to one decimal place. =
  5. 5.Which is closest to 302 × 22? (Round each number first.) (a) 6000 (b) 60000 (c) 12000 (d) 600
  6. 6.Which is closest to 1006 ÷ 19? (a) 500 (b) 25 (c) 50 (d) 100
  7. 7.Round 17926 to the nearest thousand.
  8. 8.Which is closest to 898 × 38? (Round each number first.) (a) 36000 (b) 360000 (c) 3600 (d) 72000
  9. 9.Round 33.83 to one decimal place. =
  10. 10.Which is closest to 796 + 295 + 598? (a) 1600 (b) 1700 (c) 1900 (d) 1800
  11. 11.Round 17297 to the nearest hundred.
  12. 12.Round 93.93 to one decimal place. =
  13. 13.Round 99.34 to one decimal place. =
  14. 14.Round 53394 to the nearest hundred.
  15. 15.Round 31576 to the nearest thousand.
  16. 16.Which is closest to 1196 ÷ 41? (a) 60 (b) 300 (c) 15 (d) 30
  17. 17.Round 58.66 to one decimal place. =
  18. 18.Round 25408 to the nearest hundred.
  19. 19.Which is closest to 702 × 69? (Round each number first.) (a) 49000 (b) 98000 (c) 490000 (d) 4900
  20. 20.Which is closest to 696 × 32? (Round each number first.) (a) 2100 (b) 42000 (c) 210000 (d) 21000
  21. 21.Round 32744 to the nearest hundred.
  22. 22.Round 40413 to the nearest ten.
  23. 23.Which is closest to 791 ÷ 41? (a) 200 (b) 20 (c) 40 (d) 10
  24. 24.Which is closest to 401 + 897 + 300? (a) 1800 (b) 1700 (c) 1600 (d) 1500
  25. 25.Which is closest to 701 × 61? (Round each number first.) (a) 420000 (b) 84000 (c) 4200 (d) 42000
  26. 26.Round 33.59 to one decimal place. =
  27. 27.Round 80885 to the nearest thousand.
  28. 28.Which is closest to 596 + 904 + 797? (a) 2400 (b) 2200 (c) 2500 (d) 2300
  29. 29.Which is closest to 1608 ÷ 41? (a) 400 (b) 80 (c) 20 (d) 40
  30. 30.Which is closest to 204 + 402 + 302? (a) 800 (b) 1100 (c) 900 (d) 1000
  31. 31.Which is closest to 796 ÷ 19? (a) 400 (b) 40 (c) 20 (d) 80
  32. 32.Which is closest to 904 + 904 + 900? (a) 2800 (b) 2700 (c) 2600 (d) 2900
  33. 33.Which is closest to 395 ÷ 19? (a) 200 (b) 20 (c) 40 (d) 10
  34. 34.Round 16.56 to one decimal place. =
  35. 35.Which is closest to 2396 ÷ 41? (a) 600 (b) 30 (c) 120 (d) 60
  36. 36.Which is closest to 496 × 38? (Round each number first.) (a) 40000 (b) 20000 (c) 200000 (d) 2000
  37. 37.Which is closest to 98 + 98 + 403? (a) 600 (b) 500 (c) 700 (d) 800
  38. 38.Round 84.18 to one decimal place. =
  39. 39.Which is closest to 501 × 78? (Round each number first.) (a) 80000 (b) 400000 (c) 40000 (d) 4000
  40. 40.Round 47.26 to one decimal place. =

Answer key

  1. 9000
  2. 29.6
  3. 85.8
  4. 16.1
  5. 6000
  6. 50
  7. 18000
  8. 36000
  9. 33.8
  10. 1700
  11. 17300
  12. 93.9
  13. 99.3
  14. 53400
  15. 32000
  16. 30
  17. 58.7
  18. 25400
  19. 49000
  20. 21000
  21. 32700
  22. 40410
  23. 20
  24. 1600
  25. 42000
  26. 33.6
  27. 81000
  28. 2300
  29. 40
  30. 900
  31. 40
  32. 2700
  33. 20
  34. 16.6
  35. 60
  36. 20000
  37. 600
  38. 84.2
  39. 40000
  40. 47.3

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