← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 587 · 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 41044 to the nearest hundred.
  2. 2.Which is closest to 198 + 695 + 396? (a) 1500 (b) 1400 (c) 1300 (d) 1200
  3. 3.Which is closest to 1792 ÷ 19? (a) 900 (b) 90 (c) 45 (d) 180
  4. 4.Which is closest to 1596 ÷ 21? (a) 80 (b) 160 (c) 800 (d) 40
  5. 5.Round 48.53 to one decimal place. =
  6. 6.Round 10.22 to one decimal place. =
  7. 7.Round 74604 to the nearest ten.
  8. 8.Round 88.24 to one decimal place. =
  9. 9.Round 88701 to the nearest ten.
  10. 10.Round 88.91 to one decimal place. =
  11. 11.Which is closest to 796 × 49? (Round each number first.) (a) 4000 (b) 400000 (c) 80000 (d) 40000
  12. 12.Which is closest to 900 × 28? (Round each number first.) (a) 270000 (b) 54000 (c) 2700 (d) 27000
  13. 13.Which is closest to 298 + 804 + 396? (a) 1400 (b) 1500 (c) 1600 (d) 1700
  14. 14.Round 60112 to the nearest hundred.
  15. 15.Which is closest to 695 + 705 + 103? (a) 1400 (b) 1700 (c) 1600 (d) 1500
  16. 16.Round 89.67 to one decimal place. =
  17. 17.Which is closest to 402 × 31? (Round each number first.) (a) 24000 (b) 1200 (c) 12000 (d) 120000
  18. 18.Which is closest to 295 + 896 + 899? (a) 2300 (b) 2100 (c) 2200 (d) 2000
  19. 19.Which is closest to 792 ÷ 41? (a) 10 (b) 20 (c) 40 (d) 200
  20. 20.Which is closest to 1804 ÷ 19? (a) 90 (b) 900 (c) 45 (d) 180
  21. 21.Which is closest to 899 × 20? (Round each number first.) (a) 36000 (b) 1800 (c) 180000 (d) 18000
  22. 22.Which is closest to 804 × 59? (Round each number first.) (a) 48000 (b) 96000 (c) 480000 (d) 4800
  23. 23.Round 12.89 to one decimal place. =
  24. 24.Round 34.13 to one decimal place. =
  25. 25.Which is closest to 995 ÷ 21? (a) 25 (b) 500 (c) 50 (d) 100
  26. 26.Which is closest to 201 × 62? (Round each number first.) (a) 12000 (b) 120000 (c) 24000 (d) 1200
  27. 27.Round 86.16 to one decimal place. =
  28. 28.Which is closest to 897 × 89? (Round each number first.) (a) 162000 (b) 81000 (c) 8100 (d) 810000
  29. 29.Round 60.81 to one decimal place. =
  30. 30.Which is closest to 796 ÷ 19? (a) 80 (b) 40 (c) 400 (d) 20
  31. 31.Round 41782 to the nearest hundred.
  32. 32.Round 49.41 to one decimal place. =
  33. 33.Round 65.34 to one decimal place. =
  34. 34.Which is closest to 1609 ÷ 41? (a) 80 (b) 40 (c) 400 (d) 20
  35. 35.Round 5113 to the nearest hundred.
  36. 36.Which is closest to 2802 ÷ 41? (a) 140 (b) 700 (c) 70 (d) 35
  37. 37.Which is closest to 204 × 80? (Round each number first.) (a) 16000 (b) 32000 (c) 160000 (d) 1600
  38. 38.Round 57.68 to one decimal place. =
  39. 39.Which is closest to 200 × 88? (Round each number first.) (a) 18000 (b) 180000 (c) 36000 (d) 1800
  40. 40.Which is closest to 1206 ÷ 21? (a) 120 (b) 600 (c) 60 (d) 30

Answer key

  1. 41000
  2. 1300
  3. 90
  4. 80
  5. 48.5
  6. 10.2
  7. 74600
  8. 88.2
  9. 88700
  10. 88.9
  11. 40000
  12. 27000
  13. 1500
  14. 60100
  15. 1500
  16. 89.7
  17. 12000
  18. 2100
  19. 20
  20. 90
  21. 18000
  22. 48000
  23. 12.9
  24. 34.1
  25. 50
  26. 12000
  27. 86.2
  28. 81000
  29. 60.8
  30. 40
  31. 41800
  32. 49.4
  33. 65.3
  34. 40
  35. 5100
  36. 70
  37. 16000
  38. 57.7
  39. 18000
  40. 60

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