← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 872 · 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 67.32 to one decimal place. =
  2. 2.Round 23678 to the nearest ten.
  3. 3.Which is closest to 204 × 32? (Round each number first.) (a) 600 (b) 6000 (c) 60000 (d) 12000
  4. 4.Which is closest to 299 × 78? (Round each number first.) (a) 2400 (b) 240000 (c) 24000 (d) 48000
  5. 5.Which is closest to 2105 ÷ 29? (a) 700 (b) 35 (c) 140 (d) 70
  6. 6.Round 68939 to the nearest thousand.
  7. 7.Round 86384 to the nearest ten.
  8. 8.Round 67503 to the nearest hundred.
  9. 9.Round 73.73 to one decimal place. =
  10. 10.Round 17823 to the nearest thousand.
  11. 11.Round 16287 to the nearest thousand.
  12. 12.Which is closest to 696 × 28? (Round each number first.) (a) 210000 (b) 2100 (c) 21000 (d) 42000
  13. 13.Round 94.33 to one decimal place. =
  14. 14.Which is closest to 198 + 697 + 701? (a) 1700 (b) 1500 (c) 1600 (d) 1800
  15. 15.Which is closest to 1596 ÷ 21? (a) 80 (b) 40 (c) 800 (d) 160
  16. 16.Round 67553 to the nearest ten.
  17. 17.Which is closest to 697 + 196 + 500? (a) 1300 (b) 1400 (c) 1500 (d) 1600
  18. 18.Which is closest to 1205 ÷ 21? (a) 60 (b) 120 (c) 30 (d) 600
  19. 19.Which is closest to 303 × 31? (Round each number first.) (a) 900 (b) 90000 (c) 18000 (d) 9000
  20. 20.Round 49.79 to one decimal place. =
  21. 21.Round 43060 to the nearest hundred.
  22. 22.Which is closest to 703 × 32? (Round each number first.) (a) 210000 (b) 42000 (c) 2100 (d) 21000
  23. 23.Which is closest to 398 + 95 + 405? (a) 900 (b) 1100 (c) 800 (d) 1000
  24. 24.Which is closest to 804 + 404 + 800? (a) 2000 (b) 2100 (c) 2200 (d) 1900
  25. 25.Round 70121 to the nearest ten.
  26. 26.Round 73.36 to one decimal place. =
  27. 27.Round 48.73 to one decimal place. =
  28. 28.Which is closest to 101 + 898 + 695? (a) 1600 (b) 1800 (c) 1700 (d) 1900
  29. 29.Which is closest to 906 ÷ 29? (a) 60 (b) 30 (c) 15 (d) 300
  30. 30.Round 92.41 to one decimal place. =
  31. 31.Which is closest to 1200 ÷ 19? (a) 30 (b) 600 (c) 60 (d) 120
  32. 32.Round 12.28 to one decimal place. =
  33. 33.Round 1429 to the nearest ten.
  34. 34.Which is closest to 797 × 41? (Round each number first.) (a) 3200 (b) 32000 (c) 320000 (d) 64000
  35. 35.Which is closest to 896 + 698 + 202? (a) 1800 (b) 1900 (c) 1700 (d) 2000
  36. 36.Round 84.63 to one decimal place. =
  37. 37.Which is closest to 699 × 40? (Round each number first.) (a) 56000 (b) 280000 (c) 28000 (d) 2800
  38. 38.Round 73851 to the nearest hundred.
  39. 39.Which is closest to 803 + 698 + 900? (a) 2600 (b) 2500 (c) 2300 (d) 2400
  40. 40.Which is closest to 804 × 32? (Round each number first.) (a) 240000 (b) 48000 (c) 2400 (d) 24000

Answer key

  1. 67.3
  2. 23680
  3. 6000
  4. 24000
  5. 70
  6. 69000
  7. 86380
  8. 67500
  9. 73.7
  10. 18000
  11. 16000
  12. 21000
  13. 94.3
  14. 1600
  15. 80
  16. 67550
  17. 1400
  18. 60
  19. 9000
  20. 49.8
  21. 43100
  22. 21000
  23. 900
  24. 2000
  25. 70120
  26. 73.4
  27. 48.7
  28. 1700
  29. 30
  30. 92.4
  31. 60
  32. 12.3
  33. 1430
  34. 32000
  35. 1800
  36. 84.6
  37. 28000
  38. 73900
  39. 2400
  40. 24000

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