← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 212 · 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 91332 to the nearest ten.
  2. 2.Which is closest to 2694 ÷ 31? (a) 900 (b) 180 (c) 45 (d) 90
  3. 3.Round 26.06 to one decimal place. =
  4. 4.Which is closest to 298 + 802 + 302? (a) 1500 (b) 1400 (c) 1600 (d) 1300
  5. 5.Round 84326 to the nearest thousand.
  6. 6.Which is closest to 3195 ÷ 41? (a) 40 (b) 160 (c) 800 (d) 80
  7. 7.Round 83236 to the nearest thousand.
  8. 8.Which is closest to 1395 ÷ 19? (a) 700 (b) 70 (c) 35 (d) 140
  9. 9.Which is closest to 503 + 297 + 795? (a) 1500 (b) 1600 (c) 1700 (d) 1800
  10. 10.Round 84283 to the nearest hundred.
  11. 11.Round 90.42 to one decimal place. =
  12. 12.Which is closest to 2391 ÷ 31? (a) 160 (b) 40 (c) 800 (d) 80
  13. 13.Which is closest to 599 ÷ 31? (a) 10 (b) 40 (c) 200 (d) 20
  14. 14.Round 34.77 to one decimal place. =
  15. 15.Round 18.73 to one decimal place. =
  16. 16.Which is closest to 401 × 58? (Round each number first.) (a) 24000 (b) 48000 (c) 240000 (d) 2400
  17. 17.Round 68681 to the nearest hundred.
  18. 18.Which is closest to 201 × 72? (Round each number first.) (a) 140000 (b) 1400 (c) 14000 (d) 28000
  19. 19.Which is closest to 903 + 401 + 499? (a) 1900 (b) 1800 (c) 2000 (d) 1700
  20. 20.Round 66753 to the nearest ten.
  21. 21.Round 50487 to the nearest ten.
  22. 22.Which is closest to 2809 ÷ 39? (a) 700 (b) 140 (c) 70 (d) 35
  23. 23.Round 91.22 to one decimal place. =
  24. 24.Which is closest to 896 × 60? (Round each number first.) (a) 54000 (b) 5400 (c) 540000 (d) 108000
  25. 25.Round 74501 to the nearest ten.
  26. 26.Round 70.12 to one decimal place. =
  27. 27.Which is closest to 898 × 90? (Round each number first.) (a) 8100 (b) 81000 (c) 810000 (d) 162000
  28. 28.Which is closest to 1191 ÷ 41? (a) 60 (b) 30 (c) 15 (d) 300
  29. 29.Which is closest to 1799 ÷ 21? (a) 900 (b) 180 (c) 45 (d) 90
  30. 30.Which is closest to 596 + 600 + 396? (a) 1800 (b) 1600 (c) 1500 (d) 1700
  31. 31.Which is closest to 498 + 99 + 195? (a) 900 (b) 700 (c) 1000 (d) 800
  32. 32.Which is closest to 3595 ÷ 39? (a) 45 (b) 180 (c) 90 (d) 900
  33. 33.Round 66178 to the nearest hundred.
  34. 34.Which is closest to 903 × 48? (Round each number first.) (a) 90000 (b) 4500 (c) 45000 (d) 450000
  35. 35.Which is closest to 603 ÷ 19? (a) 60 (b) 30 (c) 300 (d) 15
  36. 36.Round 76.94 to one decimal place. =
  37. 37.Which is closest to 2496 ÷ 51? (a) 500 (b) 50 (c) 25 (d) 100
  38. 38.Round 92.37 to one decimal place. =
  39. 39.Which is closest to 404 × 62? (Round each number first.) (a) 2400 (b) 24000 (c) 48000 (d) 240000
  40. 40.Which is closest to 497 × 82? (Round each number first.) (a) 4000 (b) 40000 (c) 80000 (d) 400000

Answer key

  1. 91330
  2. 90
  3. 26.1
  4. 1400
  5. 84000
  6. 80
  7. 83000
  8. 70
  9. 1600
  10. 84300
  11. 90.4
  12. 80
  13. 20
  14. 34.8
  15. 18.7
  16. 24000
  17. 68700
  18. 14000
  19. 1800
  20. 66750
  21. 50490
  22. 70
  23. 91.2
  24. 54000
  25. 74500
  26. 70.1
  27. 81000
  28. 30
  29. 90
  30. 1600
  31. 800
  32. 90
  33. 66200
  34. 45000
  35. 30
  36. 76.9
  37. 50
  38. 92.4
  39. 24000
  40. 40000

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