← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 477 · 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.Which is closest to 300 × 72? (Round each number first.) (a) 2100 (b) 210000 (c) 21000 (d) 42000
  2. 2.Which is closest to 393 ÷ 21? (a) 20 (b) 10 (c) 40 (d) 200
  3. 3.Which is closest to 1594 ÷ 19? (a) 40 (b) 160 (c) 80 (d) 800
  4. 4.Which is closest to 903 ÷ 31? (a) 30 (b) 60 (c) 300 (d) 15
  5. 5.Which is closest to 704 + 595 + 397? (a) 1700 (b) 1600 (c) 1800 (d) 1900
  6. 6.Which is closest to 999 ÷ 19? (a) 500 (b) 25 (c) 50 (d) 100
  7. 7.Which is closest to 800 + 397 + 497? (a) 1600 (b) 1900 (c) 1800 (d) 1700
  8. 8.Round 87572 to the nearest thousand.
  9. 9.Which is closest to 907 ÷ 31? (a) 60 (b) 30 (c) 15 (d) 300
  10. 10.Round 62056 to the nearest ten.
  11. 11.Round 34.11 to one decimal place. =
  12. 12.Round 63.71 to one decimal place. =
  13. 13.Which is closest to 196 + 102 + 604? (a) 800 (b) 1100 (c) 1000 (d) 900
  14. 14.Round 13.12 to one decimal place. =
  15. 15.Which is closest to 900 + 401 + 205? (a) 1600 (b) 1500 (c) 1700 (d) 1400
  16. 16.Which is closest to 1599 ÷ 19? (a) 40 (b) 160 (c) 80 (d) 800
  17. 17.Which is closest to 501 × 81? (Round each number first.) (a) 80000 (b) 40000 (c) 400000 (d) 4000
  18. 18.Round 60.28 to one decimal place. =
  19. 19.Which is closest to 296 × 82? (Round each number first.) (a) 48000 (b) 24000 (c) 2400 (d) 240000
  20. 20.Which is closest to 604 × 19? (Round each number first.) (a) 120000 (b) 12000 (c) 1200 (d) 24000
  21. 21.Round 32.66 to one decimal place. =
  22. 22.Which is closest to 1601 ÷ 21? (a) 40 (b) 80 (c) 800 (d) 160
  23. 23.Round 22.72 to one decimal place. =
  24. 24.Round 18692 to the nearest ten.
  25. 25.Which is closest to 197 × 30? (Round each number first.) (a) 12000 (b) 600 (c) 6000 (d) 60000
  26. 26.Round 87.86 to one decimal place. =
  27. 27.Round 50757 to the nearest thousand.
  28. 28.Which is closest to 2799 ÷ 39? (a) 700 (b) 70 (c) 35 (d) 140
  29. 29.Which is closest to 504 × 72? (Round each number first.) (a) 350000 (b) 3500 (c) 70000 (d) 35000
  30. 30.Which is closest to 896 × 78? (Round each number first.) (a) 7200 (b) 720000 (c) 144000 (d) 72000
  31. 31.Which is closest to 1795 ÷ 21? (a) 900 (b) 180 (c) 90 (d) 45
  32. 32.Which is closest to 695 + 898 + 304? (a) 1800 (b) 2000 (c) 2100 (d) 1900
  33. 33.Which is closest to 102 + 103 + 897? (a) 1000 (b) 1100 (c) 1300 (d) 1200
  34. 34.Which is closest to 601 × 41? (Round each number first.) (a) 48000 (b) 240000 (c) 24000 (d) 2400
  35. 35.Round 68.66 to one decimal place. =
  36. 36.Which is closest to 199 × 59? (Round each number first.) (a) 12000 (b) 24000 (c) 1200 (d) 120000
  37. 37.Which is closest to 392 ÷ 21? (a) 10 (b) 40 (c) 200 (d) 20
  38. 38.Which is closest to 399 × 50? (Round each number first.) (a) 40000 (b) 200000 (c) 20000 (d) 2000
  39. 39.Which is closest to 795 + 798 + 900? (a) 2600 (b) 2500 (c) 2700 (d) 2400
  40. 40.Round 3416 to the nearest hundred.

Answer key

  1. 21000
  2. 20
  3. 80
  4. 30
  5. 1700
  6. 50
  7. 1700
  8. 88000
  9. 30
  10. 62060
  11. 34.1
  12. 63.7
  13. 900
  14. 13.1
  15. 1500
  16. 80
  17. 40000
  18. 60.3
  19. 24000
  20. 12000
  21. 32.7
  22. 80
  23. 22.7
  24. 18690
  25. 6000
  26. 87.9
  27. 51000
  28. 70
  29. 35000
  30. 72000
  31. 90
  32. 1900
  33. 1100
  34. 24000
  35. 68.7
  36. 12000
  37. 20
  38. 20000
  39. 2500
  40. 3400

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