← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 299 · 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 704 × 72? (Round each number first.) (a) 98000 (b) 490000 (c) 49000 (d) 4900
  2. 2.Which is closest to 95 + 695 + 102? (a) 900 (b) 800 (c) 1100 (d) 1000
  3. 3.Which is closest to 2507 ÷ 49? (a) 100 (b) 500 (c) 25 (d) 50
  4. 4.Which is closest to 99 + 295 + 705? (a) 1000 (b) 1200 (c) 1300 (d) 1100
  5. 5.Round 43326 to the nearest thousand.
  6. 6.Round 94449 to the nearest hundred.
  7. 7.Which is closest to 592 ÷ 21? (a) 300 (b) 15 (c) 30 (d) 60
  8. 8.Round 96.27 to one decimal place. =
  9. 9.Round 45919 to the nearest hundred.
  10. 10.Round 10617 to the nearest hundred.
  11. 11.Which is closest to 197 × 31? (Round each number first.) (a) 12000 (b) 6000 (c) 60000 (d) 600
  12. 12.Round 72334 to the nearest hundred.
  13. 13.Round 81.93 to one decimal place. =
  14. 14.Round 26.89 to one decimal place. =
  15. 15.Round 28.54 to one decimal place. =
  16. 16.Which is closest to 3007 ÷ 49? (a) 120 (b) 600 (c) 30 (d) 60
  17. 17.Which is closest to 703 + 103 + 897? (a) 1800 (b) 1700 (c) 1600 (d) 1900
  18. 18.Which is closest to 95 + 103 + 496? (a) 800 (b) 900 (c) 600 (d) 700
  19. 19.Which is closest to 803 + 698 + 95? (a) 1600 (b) 1700 (c) 1500 (d) 1800
  20. 20.Which is closest to 301 × 52? (Round each number first.) (a) 150000 (b) 15000 (c) 1500 (d) 30000
  21. 21.Which is closest to 203 + 696 + 302? (a) 1100 (b) 1400 (c) 1200 (d) 1300
  22. 22.Round 1392 to the nearest ten.
  23. 23.Which is closest to 300 + 504 + 400? (a) 1200 (b) 1400 (c) 1300 (d) 1100
  24. 24.Round 65.53 to one decimal place. =
  25. 25.Which is closest to 204 × 90? (Round each number first.) (a) 1800 (b) 180000 (c) 18000 (d) 36000
  26. 26.Round 17.21 to one decimal place. =
  27. 27.Which is closest to 602 × 82? (Round each number first.) (a) 480000 (b) 4800 (c) 96000 (d) 48000
  28. 28.Which is closest to 992 ÷ 21? (a) 25 (b) 500 (c) 100 (d) 50
  29. 29.Round 57317 to the nearest ten.
  30. 30.Which is closest to 397 × 72? (Round each number first.) (a) 56000 (b) 280000 (c) 28000 (d) 2800
  31. 31.Round 21.13 to one decimal place. =
  32. 32.Round 38.07 to one decimal place. =
  33. 33.Which is closest to 203 × 50? (Round each number first.) (a) 100000 (b) 20000 (c) 10000 (d) 1000
  34. 34.Which is closest to 1809 ÷ 19? (a) 90 (b) 900 (c) 45 (d) 180
  35. 35.Which is closest to 496 × 79? (Round each number first.) (a) 80000 (b) 4000 (c) 40000 (d) 400000
  36. 36.Which is closest to 303 + 798 + 805? (a) 1800 (b) 2000 (c) 1900 (d) 2100
  37. 37.Round 8215 to the nearest thousand.
  38. 38.Round 33.34 to one decimal place. =
  39. 39.Which is closest to 203 × 29? (Round each number first.) (a) 600 (b) 60000 (c) 12000 (d) 6000
  40. 40.Which is closest to 96 + 601 + 904? (a) 1800 (b) 1600 (c) 1500 (d) 1700

Answer key

  1. 49000
  2. 900
  3. 50
  4. 1100
  5. 43000
  6. 94400
  7. 30
  8. 96.3
  9. 45900
  10. 10600
  11. 6000
  12. 72300
  13. 81.9
  14. 26.9
  15. 28.5
  16. 60
  17. 1700
  18. 700
  19. 1600
  20. 15000
  21. 1200
  22. 1390
  23. 1200
  24. 65.5
  25. 18000
  26. 17.2
  27. 48000
  28. 50
  29. 57320
  30. 28000
  31. 21.1
  32. 38.1
  33. 10000
  34. 90
  35. 40000
  36. 1900
  37. 8000
  38. 33.3
  39. 6000
  40. 1600

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