← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 241 · 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 31024 to the nearest thousand.
  2. 2.Round 70.84 to one decimal place. =
  3. 3.Round 28.11 to one decimal place. =
  4. 4.Round 3840 to the nearest thousand.
  5. 5.Which is closest to 593 ÷ 19? (a) 60 (b) 15 (c) 300 (d) 30
  6. 6.Round 32.67 to one decimal place. =
  7. 7.Which is closest to 399 + 898 + 395? (a) 1700 (b) 1900 (c) 1800 (d) 1600
  8. 8.Which is closest to 603 + 902 + 896? (a) 2600 (b) 2500 (c) 2300 (d) 2400
  9. 9.Which is closest to 500 × 39? (Round each number first.) (a) 200000 (b) 2000 (c) 40000 (d) 20000
  10. 10.Which is closest to 2505 ÷ 49? (a) 25 (b) 100 (c) 500 (d) 50
  11. 11.Which is closest to 795 ÷ 21? (a) 40 (b) 80 (c) 20 (d) 400
  12. 12.Which is closest to 797 × 18? (Round each number first.) (a) 32000 (b) 16000 (c) 160000 (d) 1600
  13. 13.Round 41.68 to one decimal place. =
  14. 14.Which is closest to 905 + 495 + 195? (a) 1700 (b) 1500 (c) 1800 (d) 1600
  15. 15.Round 60551 to the nearest thousand.
  16. 16.Round 50.63 to one decimal place. =
  17. 17.Round 28634 to the nearest hundred.
  18. 18.Which is closest to 893 ÷ 29? (a) 300 (b) 60 (c) 15 (d) 30
  19. 19.Which is closest to 802 + 798 + 402? (a) 2200 (b) 1900 (c) 2100 (d) 2000
  20. 20.Which is closest to 303 × 39? (Round each number first.) (a) 1200 (b) 120000 (c) 24000 (d) 12000
  21. 21.Which is closest to 1209 ÷ 39? (a) 60 (b) 300 (c) 15 (d) 30
  22. 22.Which is closest to 399 ÷ 19? (a) 20 (b) 40 (c) 10 (d) 200
  23. 23.Round 12.06 to one decimal place. =
  24. 24.Round 26.67 to one decimal place. =
  25. 25.Which is closest to 799 + 502 + 95? (a) 1500 (b) 1600 (c) 1400 (d) 1300
  26. 26.Which is closest to 903 × 71? (Round each number first.) (a) 126000 (b) 63000 (c) 630000 (d) 6300
  27. 27.Round 10104 to the nearest thousand.
  28. 28.Round 80.64 to one decimal place. =
  29. 29.Which is closest to 394 ÷ 19? (a) 200 (b) 40 (c) 20 (d) 10
  30. 30.Which is closest to 502 × 89? (Round each number first.) (a) 4500 (b) 450000 (c) 90000 (d) 45000
  31. 31.Which is closest to 696 × 78? (Round each number first.) (a) 5600 (b) 56000 (c) 112000 (d) 560000
  32. 32.Which is closest to 197 × 29? (Round each number first.) (a) 60000 (b) 600 (c) 6000 (d) 12000
  33. 33.Which is closest to 698 + 105 + 902? (a) 1900 (b) 1800 (c) 1700 (d) 1600
  34. 34.Which is closest to 1204 ÷ 39? (a) 300 (b) 60 (c) 15 (d) 30
  35. 35.Which is closest to 404 + 905 + 398? (a) 1600 (b) 1800 (c) 1700 (d) 1900
  36. 36.Which is closest to 295 + 898 + 900? (a) 2200 (b) 2000 (c) 2300 (d) 2100
  37. 37.Round 82367 to the nearest thousand.
  38. 38.Which is closest to 1202 ÷ 31? (a) 20 (b) 80 (c) 400 (d) 40
  39. 39.Round 70509 to the nearest hundred.
  40. 40.Which is closest to 497 × 61? (Round each number first.) (a) 60000 (b) 3000 (c) 300000 (d) 30000

Answer key

  1. 31000
  2. 70.8
  3. 28.1
  4. 4000
  5. 30
  6. 32.7
  7. 1700
  8. 2400
  9. 20000
  10. 50
  11. 40
  12. 16000
  13. 41.7
  14. 1600
  15. 61000
  16. 50.6
  17. 28600
  18. 30
  19. 2000
  20. 12000
  21. 30
  22. 20
  23. 12.1
  24. 26.7
  25. 1400
  26. 63000
  27. 10000
  28. 80.6
  29. 20
  30. 45000
  31. 56000
  32. 6000
  33. 1700
  34. 30
  35. 1700
  36. 2100
  37. 82000
  38. 40
  39. 70500
  40. 30000

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