← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 801 · 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 304 × 21? (Round each number first.) (a) 60000 (b) 6000 (c) 12000 (d) 600
  2. 2.Which is closest to 303 + 897 + 100? (a) 1300 (b) 1200 (c) 1400 (d) 1500
  3. 3.Round 39471 to the nearest thousand.
  4. 4.Round 64547 to the nearest thousand.
  5. 5.Which is closest to 1000 ÷ 19? (a) 100 (b) 500 (c) 25 (d) 50
  6. 6.Round 77667 to the nearest thousand.
  7. 7.Round 99107 to the nearest thousand.
  8. 8.Which is closest to 1191 ÷ 41? (a) 15 (b) 60 (c) 300 (d) 30
  9. 9.Round 87886 to the nearest thousand.
  10. 10.Which is closest to 1497 ÷ 49? (a) 30 (b) 15 (c) 300 (d) 60
  11. 11.Round 48976 to the nearest hundred.
  12. 12.Which is closest to 804 ÷ 39? (a) 40 (b) 10 (c) 200 (d) 20
  13. 13.Which is closest to 501 × 22? (Round each number first.) (a) 20000 (b) 100000 (c) 10000 (d) 1000
  14. 14.Which is closest to 301 × 51? (Round each number first.) (a) 15000 (b) 30000 (c) 1500 (d) 150000
  15. 15.Which is closest to 703 + 803 + 196? (a) 1900 (b) 1700 (c) 1800 (d) 1600
  16. 16.Which is closest to 797 × 62? (Round each number first.) (a) 480000 (b) 4800 (c) 96000 (d) 48000
  17. 17.Round 10.64 to one decimal place. =
  18. 18.Round 74530 to the nearest thousand.
  19. 19.Which is closest to 301 × 90? (Round each number first.) (a) 2700 (b) 270000 (c) 54000 (d) 27000
  20. 20.Which is closest to 499 × 70? (Round each number first.) (a) 3500 (b) 70000 (c) 350000 (d) 35000
  21. 21.Round 70.26 to one decimal place. =
  22. 22.Which is closest to 296 × 30? (Round each number first.) (a) 900 (b) 9000 (c) 90000 (d) 18000
  23. 23.Which is closest to 596 × 59? (Round each number first.) (a) 36000 (b) 72000 (c) 3600 (d) 360000
  24. 24.Which is closest to 497 × 41? (Round each number first.) (a) 20000 (b) 200000 (c) 2000 (d) 40000
  25. 25.Which is closest to 796 + 196 + 299? (a) 1200 (b) 1400 (c) 1500 (d) 1300
  26. 26.Round 92.21 to one decimal place. =
  27. 27.Which is closest to 3197 ÷ 39? (a) 800 (b) 80 (c) 40 (d) 160
  28. 28.Round 13015 to the nearest hundred.
  29. 29.Which is closest to 297 × 91? (Round each number first.) (a) 27000 (b) 270000 (c) 54000 (d) 2700
  30. 30.Round 79754 to the nearest thousand.
  31. 31.Which is closest to 197 × 18? (Round each number first.) (a) 8000 (b) 4000 (c) 400 (d) 40000
  32. 32.Round 35.86 to one decimal place. =
  33. 33.Which is closest to 4009 ÷ 51? (a) 80 (b) 160 (c) 800 (d) 40
  34. 34.Round 81.18 to one decimal place. =
  35. 35.Which is closest to 998 ÷ 51? (a) 200 (b) 10 (c) 20 (d) 40
  36. 36.Which is closest to 200 + 800 + 196? (a) 1400 (b) 1100 (c) 1300 (d) 1200
  37. 37.Round 92.14 to one decimal place. =
  38. 38.Which is closest to 701 + 803 + 898? (a) 2500 (b) 2600 (c) 2400 (d) 2300
  39. 39.Which is closest to 1999 ÷ 41? (a) 25 (b) 100 (c) 50 (d) 500
  40. 40.Which is closest to 897 + 699 + 704? (a) 2500 (b) 2200 (c) 2300 (d) 2400

Answer key

  1. 6000
  2. 1300
  3. 39000
  4. 65000
  5. 50
  6. 78000
  7. 99000
  8. 30
  9. 88000
  10. 30
  11. 49000
  12. 20
  13. 10000
  14. 15000
  15. 1700
  16. 48000
  17. 10.6
  18. 75000
  19. 27000
  20. 35000
  21. 70.3
  22. 9000
  23. 36000
  24. 20000
  25. 1300
  26. 92.2
  27. 80
  28. 13000
  29. 27000
  30. 80000
  31. 4000
  32. 35.9
  33. 80
  34. 81.2
  35. 20
  36. 1200
  37. 92.1
  38. 2400
  39. 50
  40. 2300

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