← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 469 · 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 799 × 20? (Round each number first.) (a) 1600 (b) 160000 (c) 32000 (d) 16000
  2. 2.Which is closest to 1193 ÷ 39? (a) 60 (b) 15 (c) 300 (d) 30
  3. 3.Round 62.16 to one decimal place. =
  4. 4.Round 31482 to the nearest thousand.
  5. 5.Round 16.53 to one decimal place. =
  6. 6.Round 58.19 to one decimal place. =
  7. 7.Round 66.18 to one decimal place. =
  8. 8.Which is closest to 3593 ÷ 41? (a) 900 (b) 90 (c) 45 (d) 180
  9. 9.Which is closest to 305 + 105 + 604? (a) 1200 (b) 1000 (c) 900 (d) 1100
  10. 10.Which is closest to 897 × 62? (Round each number first.) (a) 54000 (b) 108000 (c) 5400 (d) 540000
  11. 11.Round 18855 to the nearest thousand.
  12. 12.Round 18.88 to one decimal place. =
  13. 13.Which is closest to 503 + 895 + 902? (a) 2500 (b) 2300 (c) 2200 (d) 2400
  14. 14.Round 47.88 to one decimal place. =
  15. 15.Which is closest to 502 + 601 + 399? (a) 1500 (b) 1600 (c) 1400 (d) 1700
  16. 16.Which is closest to 100 + 300 + 198? (a) 700 (b) 800 (c) 500 (d) 600
  17. 17.Which is closest to 2000 ÷ 41? (a) 100 (b) 50 (c) 25 (d) 500
  18. 18.Which is closest to 801 × 59? (Round each number first.) (a) 48000 (b) 480000 (c) 96000 (d) 4800
  19. 19.Round 86.08 to one decimal place. =
  20. 20.Round 91.63 to one decimal place. =
  21. 21.Round 62.79 to one decimal place. =
  22. 22.Round 2626 to the nearest ten.
  23. 23.Round 5431 to the nearest thousand.
  24. 24.Which is closest to 396 × 78? (Round each number first.) (a) 3200 (b) 320000 (c) 64000 (d) 32000
  25. 25.Which is closest to 404 × 81? (Round each number first.) (a) 320000 (b) 32000 (c) 64000 (d) 3200
  26. 26.Round 66068 to the nearest ten.
  27. 27.Which is closest to 300 × 21? (Round each number first.) (a) 60000 (b) 12000 (c) 600 (d) 6000
  28. 28.Which is closest to 403 × 72? (Round each number first.) (a) 56000 (b) 2800 (c) 280000 (d) 28000
  29. 29.Which is closest to 3005 ÷ 49? (a) 60 (b) 30 (c) 600 (d) 120
  30. 30.Which is closest to 2406 ÷ 29? (a) 800 (b) 40 (c) 160 (d) 80
  31. 31.Which is closest to 399 × 89? (Round each number first.) (a) 3600 (b) 72000 (c) 360000 (d) 36000
  32. 32.Round 67355 to the nearest hundred.
  33. 33.Round 82.94 to one decimal place. =
  34. 34.Which is closest to 3508 ÷ 49? (a) 140 (b) 700 (c) 35 (d) 70
  35. 35.Which is closest to 595 + 500 + 301? (a) 1600 (b) 1300 (c) 1500 (d) 1400
  36. 36.Round 70248 to the nearest ten.
  37. 37.Which is closest to 905 + 701 + 601? (a) 2400 (b) 2100 (c) 2200 (d) 2300
  38. 38.Which is closest to 199 × 59? (Round each number first.) (a) 24000 (b) 1200 (c) 120000 (d) 12000
  39. 39.Round 53.36 to one decimal place. =
  40. 40.Which is closest to 1502 ÷ 29? (a) 100 (b) 25 (c) 50 (d) 500

Answer key

  1. 16000
  2. 30
  3. 62.2
  4. 31000
  5. 16.5
  6. 58.2
  7. 66.2
  8. 90
  9. 1000
  10. 54000
  11. 19000
  12. 18.9
  13. 2300
  14. 47.9
  15. 1500
  16. 600
  17. 50
  18. 48000
  19. 86.1
  20. 91.6
  21. 62.8
  22. 2630
  23. 5000
  24. 32000
  25. 32000
  26. 66070
  27. 6000
  28. 28000
  29. 60
  30. 80
  31. 36000
  32. 67400
  33. 82.9
  34. 70
  35. 1400
  36. 70250
  37. 2200
  38. 12000
  39. 53.4
  40. 50

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