← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 1 · 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 14.53 to one decimal place. =
  2. 2.Which is closest to 400 × 59? (Round each number first.) (a) 24000 (b) 2400 (c) 48000 (d) 240000
  3. 3.Which is closest to 604 × 78? (Round each number first.) (a) 480000 (b) 4800 (c) 96000 (d) 48000
  4. 4.Round 65732 to the nearest thousand.
  5. 5.Round 75721 to the nearest hundred.
  6. 6.Which is closest to 96 + 298 + 95? (a) 400 (b) 700 (c) 500 (d) 600
  7. 7.Which is closest to 2802 ÷ 41? (a) 140 (b) 70 (c) 35 (d) 700
  8. 8.Round 88875 to the nearest thousand.
  9. 9.Round 82174 to the nearest hundred.
  10. 10.Which is closest to 95 + 797 + 200? (a) 1100 (b) 1200 (c) 1300 (d) 1000
  11. 11.Which is closest to 399 × 29? (Round each number first.) (a) 120000 (b) 1200 (c) 12000 (d) 24000
  12. 12.Round 76.76 to one decimal place. =
  13. 13.Which is closest to 802 + 200 + 600? (a) 1500 (b) 1700 (c) 1800 (d) 1600
  14. 14.Which is closest to 105 + 403 + 600? (a) 1300 (b) 1100 (c) 1200 (d) 1000
  15. 15.Round 45870 to the nearest thousand.
  16. 16.Round 48.43 to one decimal place. =
  17. 17.Which is closest to 904 + 800 + 799? (a) 2400 (b) 2600 (c) 2700 (d) 2500
  18. 18.Which is closest to 604 × 60? (Round each number first.) (a) 36000 (b) 72000 (c) 3600 (d) 360000
  19. 19.Which is closest to 195 + 801 + 601? (a) 1800 (b) 1500 (c) 1600 (d) 1700
  20. 20.Round 51.86 to one decimal place. =
  21. 21.Which is closest to 503 + 601 + 895? (a) 1900 (b) 2100 (c) 2000 (d) 2200
  22. 22.Round 94.48 to one decimal place. =
  23. 23.Which is closest to 395 + 796 + 103? (a) 1400 (b) 1200 (c) 1300 (d) 1500
  24. 24.Round 30779 to the nearest hundred.
  25. 25.Round 64.59 to one decimal place. =
  26. 26.Which is closest to 3594 ÷ 39? (a) 45 (b) 180 (c) 90 (d) 900
  27. 27.Round 67.06 to one decimal place. =
  28. 28.Round 27.14 to one decimal place. =
  29. 29.Round 66.37 to one decimal place. =
  30. 30.Round 90313 to the nearest hundred.
  31. 31.Which is closest to 1498 ÷ 49? (a) 15 (b) 300 (c) 60 (d) 30
  32. 32.Round 19.21 to one decimal place. =
  33. 33.Round 83.69 to one decimal place. =
  34. 34.Round 25.12 to one decimal place. =
  35. 35.Which is closest to 98 + 805 + 597? (a) 1400 (b) 1500 (c) 1700 (d) 1600
  36. 36.Which is closest to 1609 ÷ 39? (a) 80 (b) 40 (c) 20 (d) 400
  37. 37.Which is closest to 804 + 204 + 198? (a) 1400 (b) 1300 (c) 1200 (d) 1100
  38. 38.Round 29.46 to one decimal place. =
  39. 39.Which is closest to 297 + 498 + 795? (a) 1700 (b) 1500 (c) 1800 (d) 1600
  40. 40.Which is closest to 1495 ÷ 51? (a) 60 (b) 300 (c) 15 (d) 30

Answer key

  1. 14.5
  2. 24000
  3. 48000
  4. 66000
  5. 75700
  6. 500
  7. 70
  8. 89000
  9. 82200
  10. 1100
  11. 12000
  12. 76.8
  13. 1600
  14. 1100
  15. 46000
  16. 48.4
  17. 2500
  18. 36000
  19. 1600
  20. 51.9
  21. 2000
  22. 94.5
  23. 1300
  24. 30800
  25. 64.6
  26. 90
  27. 67.1
  28. 27.1
  29. 66.4
  30. 90300
  31. 30
  32. 19.2
  33. 83.7
  34. 25.1
  35. 1500
  36. 40
  37. 1200
  38. 29.5
  39. 1600
  40. 30

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