← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 313 · 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 796 × 31? (Round each number first.) (a) 240000 (b) 24000 (c) 48000 (d) 2400
  2. 2.Round 94959 to the nearest ten.
  3. 3.Which is closest to 702 + 796 + 798? (a) 2300 (b) 2200 (c) 2400 (d) 2500
  4. 4.Which is closest to 798 + 100 + 104? (a) 1200 (b) 1100 (c) 1000 (d) 900
  5. 5.Round 10.81 to one decimal place. =
  6. 6.Round 1207 to the nearest thousand.
  7. 7.Which is closest to 397 × 59? (Round each number first.) (a) 24000 (b) 2400 (c) 240000 (d) 48000
  8. 8.Which is closest to 200 × 21? (Round each number first.) (a) 4000 (b) 400 (c) 8000 (d) 40000
  9. 9.Which is closest to 3193 ÷ 41? (a) 40 (b) 80 (c) 160 (d) 800
  10. 10.Which is closest to 396 × 59? (Round each number first.) (a) 2400 (b) 240000 (c) 24000 (d) 48000
  11. 11.Round 46.92 to one decimal place. =
  12. 12.Which is closest to 905 + 200 + 95? (a) 1100 (b) 1200 (c) 1300 (d) 1400
  13. 13.Round 24.56 to one decimal place. =
  14. 14.Round 32001 to the nearest ten.
  15. 15.Which is closest to 198 × 72? (Round each number first.) (a) 1400 (b) 14000 (c) 140000 (d) 28000
  16. 16.Round 55580 to the nearest thousand.
  17. 17.Round 81.48 to one decimal place. =
  18. 18.Which is closest to 1799 ÷ 31? (a) 120 (b) 30 (c) 600 (d) 60
  19. 19.Round 90.77 to one decimal place. =
  20. 20.Round 69997 to the nearest hundred.
  21. 21.Round 28012 to the nearest hundred.
  22. 22.Round 29558 to the nearest thousand.
  23. 23.Round 65.92 to one decimal place. =
  24. 24.Which is closest to 296 × 38? (Round each number first.) (a) 1200 (b) 12000 (c) 24000 (d) 120000
  25. 25.Round 97424 to the nearest hundred.
  26. 26.Which is closest to 697 + 99 + 798? (a) 1800 (b) 1500 (c) 1600 (d) 1700
  27. 27.Which is closest to 502 × 80? (Round each number first.) (a) 4000 (b) 80000 (c) 400000 (d) 40000
  28. 28.Round 52.69 to one decimal place. =
  29. 29.Which is closest to 197 + 405 + 805? (a) 1600 (b) 1500 (c) 1300 (d) 1400
  30. 30.Round 27.86 to one decimal place. =
  31. 31.Round 81866 to the nearest hundred.
  32. 32.Which is closest to 403 × 21? (Round each number first.) (a) 16000 (b) 80000 (c) 8000 (d) 800
  33. 33.Round 98486 to the nearest ten.
  34. 34.Round 1116 to the nearest ten.
  35. 35.Which is closest to 405 + 95 + 795? (a) 1400 (b) 1500 (c) 1300 (d) 1200
  36. 36.Round 78.38 to one decimal place. =
  37. 37.Round 18.81 to one decimal place. =
  38. 38.Which is closest to 2401 ÷ 29? (a) 160 (b) 800 (c) 40 (d) 80
  39. 39.Round 39.67 to one decimal place. =
  40. 40.Which is closest to 199 + 105 + 505? (a) 800 (b) 1000 (c) 700 (d) 900

Answer key

  1. 24000
  2. 94960
  3. 2300
  4. 1000
  5. 10.8
  6. 1000
  7. 24000
  8. 4000
  9. 80
  10. 24000
  11. 46.9
  12. 1200
  13. 24.6
  14. 32000
  15. 14000
  16. 56000
  17. 81.5
  18. 60
  19. 90.8
  20. 70000
  21. 28000
  22. 30000
  23. 65.9
  24. 12000
  25. 97400
  26. 1600
  27. 40000
  28. 52.7
  29. 1400
  30. 27.9
  31. 81900
  32. 8000
  33. 98490
  34. 1120
  35. 1300
  36. 78.4
  37. 18.8
  38. 80
  39. 39.7
  40. 800

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