← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 236 · 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 14.38 to one decimal place. =
  2. 2.Which is closest to 405 + 403 + 201? (a) 900 (b) 1100 (c) 1000 (d) 1200
  3. 3.Round 30.52 to one decimal place. =
  4. 4.Which is closest to 704 × 91? (Round each number first.) (a) 126000 (b) 630000 (c) 6300 (d) 63000
  5. 5.Which is closest to 499 × 29? (Round each number first.) (a) 1500 (b) 30000 (c) 150000 (d) 15000
  6. 6.Which is closest to 403 + 895 + 698? (a) 1900 (b) 2100 (c) 2000 (d) 2200
  7. 7.Which is closest to 700 × 19? (Round each number first.) (a) 140000 (b) 1400 (c) 28000 (d) 14000
  8. 8.Round 46.51 to one decimal place. =
  9. 9.Round 13157 to the nearest ten.
  10. 10.Which is closest to 398 + 905 + 795? (a) 2100 (b) 2300 (c) 2200 (d) 2000
  11. 11.Round 98559 to the nearest ten.
  12. 12.Which is closest to 799 + 703 + 203? (a) 1700 (b) 1600 (c) 1800 (d) 1900
  13. 13.Which is closest to 4009 ÷ 49? (a) 160 (b) 80 (c) 40 (d) 800
  14. 14.Which is closest to 898 × 49? (Round each number first.) (a) 45000 (b) 450000 (c) 90000 (d) 4500
  15. 15.Round 98.27 to one decimal place. =
  16. 16.Which is closest to 601 ÷ 29? (a) 200 (b) 20 (c) 10 (d) 40
  17. 17.Round 93.46 to one decimal place. =
  18. 18.Round 24199 to the nearest ten.
  19. 19.Round 38.12 to one decimal place. =
  20. 20.Which is closest to 3197 ÷ 41? (a) 40 (b) 160 (c) 80 (d) 800
  21. 21.Which is closest to 703 + 404 + 601? (a) 1600 (b) 1800 (c) 1700 (d) 1900
  22. 22.Round 62891 to the nearest thousand.
  23. 23.Which is closest to 797 × 42? (Round each number first.) (a) 64000 (b) 32000 (c) 3200 (d) 320000
  24. 24.Round 35.92 to one decimal place. =
  25. 25.Which is closest to 3005 ÷ 51? (a) 120 (b) 600 (c) 60 (d) 30
  26. 26.Round 45696 to the nearest ten.
  27. 27.Round 11.78 to one decimal place. =
  28. 28.Round 33.11 to one decimal place. =
  29. 29.Which is closest to 1198 ÷ 41? (a) 15 (b) 300 (c) 60 (d) 30
  30. 30.Which is closest to 504 + 104 + 396? (a) 1000 (b) 900 (c) 1200 (d) 1100
  31. 31.Which is closest to 1506 ÷ 29? (a) 100 (b) 25 (c) 500 (d) 50
  32. 32.Which is closest to 701 × 49? (Round each number first.) (a) 70000 (b) 35000 (c) 3500 (d) 350000
  33. 33.Round 26.78 to one decimal place. =
  34. 34.Which is closest to 899 × 60? (Round each number first.) (a) 5400 (b) 108000 (c) 54000 (d) 540000
  35. 35.Round 17.57 to one decimal place. =
  36. 36.Which is closest to 197 × 59? (Round each number first.) (a) 120000 (b) 12000 (c) 24000 (d) 1200
  37. 37.Which is closest to 805 + 502 + 201? (a) 1600 (b) 1700 (c) 1500 (d) 1400
  38. 38.Which is closest to 501 × 28? (Round each number first.) (a) 15000 (b) 30000 (c) 150000 (d) 1500
  39. 39.Round 80.33 to one decimal place. =
  40. 40.Which is closest to 701 + 101 + 103? (a) 1000 (b) 1100 (c) 800 (d) 900

Answer key

  1. 14.4
  2. 1000
  3. 30.5
  4. 63000
  5. 15000
  6. 2000
  7. 14000
  8. 46.5
  9. 13160
  10. 2100
  11. 98560
  12. 1700
  13. 80
  14. 45000
  15. 98.3
  16. 20
  17. 93.5
  18. 24200
  19. 38.1
  20. 80
  21. 1700
  22. 63000
  23. 32000
  24. 35.9
  25. 60
  26. 45700
  27. 11.8
  28. 33.1
  29. 30
  30. 1000
  31. 50
  32. 35000
  33. 26.8
  34. 54000
  35. 17.6
  36. 12000
  37. 1500
  38. 15000
  39. 80.3
  40. 900

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