← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 88 · 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 502 + 99 + 105? (a) 600 (b) 800 (c) 700 (d) 900
  2. 2.Round 5251 to the nearest thousand.
  3. 3.Which is closest to 1794 ÷ 31? (a) 600 (b) 120 (c) 60 (d) 30
  4. 4.Round 17.29 to one decimal place. =
  5. 5.Round 75308 to the nearest ten.
  6. 6.Which is closest to 1496 ÷ 49? (a) 15 (b) 30 (c) 60 (d) 300
  7. 7.Round 29870 to the nearest hundred.
  8. 8.Round 74897 to the nearest hundred.
  9. 9.Which is closest to 599 × 32? (Round each number first.) (a) 36000 (b) 18000 (c) 1800 (d) 180000
  10. 10.Which is closest to 896 × 38? (Round each number first.) (a) 72000 (b) 3600 (c) 360000 (d) 36000
  11. 11.Round 62091 to the nearest thousand.
  12. 12.Which is closest to 99 + 97 + 700? (a) 1000 (b) 800 (c) 1100 (d) 900
  13. 13.Which is closest to 1404 ÷ 21? (a) 35 (b) 70 (c) 700 (d) 140
  14. 14.Which is closest to 2403 ÷ 39? (a) 120 (b) 30 (c) 600 (d) 60
  15. 15.Which is closest to 502 × 29? (Round each number first.) (a) 30000 (b) 1500 (c) 150000 (d) 15000
  16. 16.Round 16.19 to one decimal place. =
  17. 17.Round 80.72 to one decimal place. =
  18. 18.Which is closest to 200 × 82? (Round each number first.) (a) 16000 (b) 32000 (c) 160000 (d) 1600
  19. 19.Round 42.92 to one decimal place. =
  20. 20.Round 69.83 to one decimal place. =
  21. 21.Which is closest to 199 × 60? (Round each number first.) (a) 1200 (b) 120000 (c) 24000 (d) 12000
  22. 22.Which is closest to 598 × 28? (Round each number first.) (a) 18000 (b) 180000 (c) 36000 (d) 1800
  23. 23.Round 28.82 to one decimal place. =
  24. 24.Round 44864 to the nearest ten.
  25. 25.Which is closest to 603 ÷ 21? (a) 300 (b) 15 (c) 60 (d) 30
  26. 26.Which is closest to 2400 ÷ 31? (a) 40 (b) 160 (c) 800 (d) 80
  27. 27.Which is closest to 1502 ÷ 49? (a) 30 (b) 60 (c) 300 (d) 15
  28. 28.Round 85.28 to one decimal place. =
  29. 29.Round 41.52 to one decimal place. =
  30. 30.Which is closest to 99 + 596 + 397? (a) 1000 (b) 1200 (c) 1300 (d) 1100
  31. 31.Round 14.37 to one decimal place. =
  32. 32.Round 39.17 to one decimal place. =
  33. 33.Which is closest to 898 × 21? (Round each number first.) (a) 18000 (b) 180000 (c) 36000 (d) 1800
  34. 34.Round 2185 to the nearest thousand.
  35. 35.Round 29.64 to one decimal place. =
  36. 36.Round 95621 to the nearest thousand.
  37. 37.Round 77791 to the nearest thousand.
  38. 38.Which is closest to 302 × 48? (Round each number first.) (a) 150000 (b) 1500 (c) 30000 (d) 15000
  39. 39.Which is closest to 601 × 18? (Round each number first.) (a) 1200 (b) 120000 (c) 24000 (d) 12000
  40. 40.Round 28.89 to one decimal place. =

Answer key

  1. 700
  2. 5000
  3. 60
  4. 17.3
  5. 75310
  6. 30
  7. 29900
  8. 74900
  9. 18000
  10. 36000
  11. 62000
  12. 900
  13. 70
  14. 60
  15. 15000
  16. 16.2
  17. 80.7
  18. 16000
  19. 42.9
  20. 69.8
  21. 12000
  22. 18000
  23. 28.8
  24. 44860
  25. 30
  26. 80
  27. 30
  28. 85.3
  29. 41.5
  30. 1100
  31. 14.4
  32. 39.2
  33. 18000
  34. 2000
  35. 29.6
  36. 96000
  37. 78000
  38. 15000
  39. 12000
  40. 28.9

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