← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 467 · 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 595 + 298 + 799? (a) 1900 (b) 1800 (c) 1700 (d) 1600
  2. 2.Which is closest to 2791 ÷ 41? (a) 140 (b) 700 (c) 70 (d) 35
  3. 3.Which is closest to 899 + 200 + 397? (a) 1700 (b) 1600 (c) 1500 (d) 1400
  4. 4.Which is closest to 899 × 69? (Round each number first.) (a) 126000 (b) 630000 (c) 63000 (d) 6300
  5. 5.Round 52.49 to one decimal place. =
  6. 6.Round 12126 to the nearest hundred.
  7. 7.Round 19729 to the nearest ten.
  8. 8.Round 76882 to the nearest ten.
  9. 9.Which is closest to 505 + 700 + 297? (a) 1600 (b) 1700 (c) 1400 (d) 1500
  10. 10.Which is closest to 604 + 502 + 200? (a) 1400 (b) 1500 (c) 1300 (d) 1200
  11. 11.Which is closest to 496 + 303 + 696? (a) 1600 (b) 1400 (c) 1500 (d) 1700
  12. 12.Which is closest to 300 + 604 + 601? (a) 1700 (b) 1500 (c) 1600 (d) 1400
  13. 13.Round 97.32 to one decimal place. =
  14. 14.Round 36.33 to one decimal place. =
  15. 15.Which is closest to 600 + 299 + 795? (a) 1600 (b) 1800 (c) 1700 (d) 1900
  16. 16.Which is closest to 898 + 104 + 898? (a) 2000 (b) 1800 (c) 2100 (d) 1900
  17. 17.Which is closest to 197 × 18? (Round each number first.) (a) 40000 (b) 400 (c) 4000 (d) 8000
  18. 18.Which is closest to 598 × 28? (Round each number first.) (a) 18000 (b) 1800 (c) 180000 (d) 36000
  19. 19.Round 29304 to the nearest ten.
  20. 20.Round 97046 to the nearest hundred.
  21. 21.Which is closest to 395 + 195 + 400? (a) 1000 (b) 1200 (c) 900 (d) 1100
  22. 22.Which is closest to 901 × 19? (Round each number first.) (a) 18000 (b) 36000 (c) 180000 (d) 1800
  23. 23.Round 78462 to the nearest thousand.
  24. 24.Which is closest to 200 + 505 + 900? (a) 1500 (b) 1800 (c) 1700 (d) 1600
  25. 25.Which is closest to 198 × 51? (Round each number first.) (a) 20000 (b) 1000 (c) 100000 (d) 10000
  26. 26.Which is closest to 696 + 905 + 805? (a) 2400 (b) 2300 (c) 2500 (d) 2600
  27. 27.Which is closest to 299 + 499 + 500? (a) 1300 (b) 1200 (c) 1500 (d) 1400
  28. 28.Which is closest to 805 + 296 + 695? (a) 1900 (b) 2000 (c) 1700 (d) 1800
  29. 29.Round 15904 to the nearest ten.
  30. 30.Which is closest to 897 × 62? (Round each number first.) (a) 5400 (b) 54000 (c) 540000 (d) 108000
  31. 31.Round 10.38 to one decimal place. =
  32. 32.Round 47.19 to one decimal place. =
  33. 33.Which is closest to 899 × 60? (Round each number first.) (a) 5400 (b) 54000 (c) 108000 (d) 540000
  34. 34.Round 20117 to the nearest thousand.
  35. 35.Round 40.54 to one decimal place. =
  36. 36.Which is closest to 402 × 91? (Round each number first.) (a) 36000 (b) 3600 (c) 72000 (d) 360000
  37. 37.Round 1771 to the nearest hundred.
  38. 38.Which is closest to 1200 ÷ 41? (a) 60 (b) 15 (c) 30 (d) 300
  39. 39.Which is closest to 301 × 70? (Round each number first.) (a) 210000 (b) 2100 (c) 42000 (d) 21000
  40. 40.Round 56732 to the nearest hundred.

Answer key

  1. 1700
  2. 70
  3. 1500
  4. 63000
  5. 52.5
  6. 12100
  7. 19730
  8. 76880
  9. 1500
  10. 1300
  11. 1500
  12. 1500
  13. 97.3
  14. 36.3
  15. 1700
  16. 1900
  17. 4000
  18. 18000
  19. 29300
  20. 97000
  21. 1000
  22. 18000
  23. 78000
  24. 1600
  25. 10000
  26. 2400
  27. 1300
  28. 1800
  29. 15900
  30. 54000
  31. 10.4
  32. 47.2
  33. 54000
  34. 20000
  35. 40.5
  36. 36000
  37. 1800
  38. 30
  39. 21000
  40. 56700

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