← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 629 · 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.Round 68.59 to one decimal place. =
  2. 2.Round 25.69 to one decimal place. =
  3. 3.Which is closest to 400 × 61? (Round each number first.) (a) 240000 (b) 48000 (c) 2400 (d) 24000
  4. 4.Which is closest to 297 × 18? (Round each number first.) (a) 12000 (b) 6000 (c) 60000 (d) 600
  5. 5.Which is closest to 599 + 602 + 304? (a) 1400 (b) 1700 (c) 1600 (d) 1500
  6. 6.Which is closest to 700 × 59? (Round each number first.) (a) 42000 (b) 84000 (c) 4200 (d) 420000
  7. 7.Which is closest to 501 × 32? (Round each number first.) (a) 150000 (b) 15000 (c) 30000 (d) 1500
  8. 8.Which is closest to 1196 ÷ 19? (a) 30 (b) 120 (c) 60 (d) 600
  9. 9.Which is closest to 1805 ÷ 31? (a) 120 (b) 600 (c) 60 (d) 30
  10. 10.Which is closest to 103 + 699 + 203? (a) 1200 (b) 1000 (c) 900 (d) 1100
  11. 11.Which is closest to 700 × 82? (Round each number first.) (a) 112000 (b) 5600 (c) 56000 (d) 560000
  12. 12.Which is closest to 699 × 21? (Round each number first.) (a) 1400 (b) 140000 (c) 28000 (d) 14000
  13. 13.Round 42.41 to one decimal place. =
  14. 14.Round 11882 to the nearest thousand.
  15. 15.Which is closest to 803 × 42? (Round each number first.) (a) 3200 (b) 64000 (c) 320000 (d) 32000
  16. 16.Round 8499 to the nearest ten.
  17. 17.Round 59.46 to one decimal place. =
  18. 18.Which is closest to 702 + 699 + 200? (a) 1500 (b) 1800 (c) 1700 (d) 1600
  19. 19.Round 47482 to the nearest ten.
  20. 20.Round 76312 to the nearest ten.
  21. 21.Which is closest to 2994 ÷ 51? (a) 600 (b) 30 (c) 120 (d) 60
  22. 22.Which is closest to 2393 ÷ 39? (a) 120 (b) 30 (c) 600 (d) 60
  23. 23.Which is closest to 1200 ÷ 41? (a) 300 (b) 30 (c) 15 (d) 60
  24. 24.Which is closest to 305 + 196 + 798? (a) 1500 (b) 1300 (c) 1400 (d) 1200
  25. 25.Which is closest to 900 × 22? (Round each number first.) (a) 36000 (b) 18000 (c) 1800 (d) 180000
  26. 26.Round 97.78 to one decimal place. =
  27. 27.Which is closest to 1495 ÷ 31? (a) 25 (b) 500 (c) 50 (d) 100
  28. 28.Round 67250 to the nearest thousand.
  29. 29.Which is closest to 200 × 21? (Round each number first.) (a) 40000 (b) 4000 (c) 8000 (d) 400
  30. 30.Which is closest to 2008 ÷ 41? (a) 500 (b) 50 (c) 100 (d) 25
  31. 31.Which is closest to 302 × 48? (Round each number first.) (a) 1500 (b) 15000 (c) 30000 (d) 150000
  32. 32.Which is closest to 2691 ÷ 29? (a) 90 (b) 900 (c) 180 (d) 45
  33. 33.Which is closest to 807 ÷ 41? (a) 200 (b) 10 (c) 20 (d) 40
  34. 34.Which is closest to 801 × 32? (Round each number first.) (a) 240000 (b) 2400 (c) 24000 (d) 48000
  35. 35.Which is closest to 796 ÷ 21? (a) 400 (b) 40 (c) 20 (d) 80
  36. 36.Which is closest to 1192 ÷ 41? (a) 300 (b) 60 (c) 15 (d) 30
  37. 37.Round 30.57 to one decimal place. =
  38. 38.Which is closest to 602 × 89? (Round each number first.) (a) 5400 (b) 540000 (c) 54000 (d) 108000
  39. 39.Round 22.94 to one decimal place. =
  40. 40.Which is closest to 396 + 205 + 901? (a) 1600 (b) 1700 (c) 1500 (d) 1400

Answer key

  1. 68.6
  2. 25.7
  3. 24000
  4. 6000
  5. 1500
  6. 42000
  7. 15000
  8. 60
  9. 60
  10. 1000
  11. 56000
  12. 14000
  13. 42.4
  14. 12000
  15. 32000
  16. 8500
  17. 59.5
  18. 1600
  19. 47480
  20. 76310
  21. 60
  22. 60
  23. 30
  24. 1300
  25. 18000
  26. 97.8
  27. 50
  28. 67000
  29. 4000
  30. 50
  31. 15000
  32. 90
  33. 20
  34. 24000
  35. 40
  36. 30
  37. 30.6
  38. 54000
  39. 22.9
  40. 1500

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