← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 49 · 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 × 22? (Round each number first.) (a) 600 (b) 6000 (c) 12000 (d) 60000
  2. 2.Round 97516 to the nearest ten.
  3. 3.Round 66.57 to one decimal place. =
  4. 4.Round 92.71 to one decimal place. =
  5. 5.Which is closest to 1792 ÷ 19? (a) 180 (b) 900 (c) 45 (d) 90
  6. 6.Which is closest to 503 × 62? (Round each number first.) (a) 30000 (b) 300000 (c) 60000 (d) 3000
  7. 7.Which is closest to 1991 ÷ 41? (a) 500 (b) 25 (c) 100 (d) 50
  8. 8.Which is closest to 298 × 92? (Round each number first.) (a) 2700 (b) 270000 (c) 27000 (d) 54000
  9. 9.Which is closest to 105 + 603 + 398? (a) 1300 (b) 1000 (c) 1100 (d) 1200
  10. 10.Which is closest to 605 ÷ 31? (a) 40 (b) 10 (c) 200 (d) 20
  11. 11.Which is closest to 805 ÷ 19? (a) 20 (b) 40 (c) 80 (d) 400
  12. 12.Round 98997 to the nearest ten.
  13. 13.Round 26.67 to one decimal place. =
  14. 14.Round 52.59 to one decimal place. =
  15. 15.Which is closest to 696 + 496 + 701? (a) 1800 (b) 1900 (c) 2100 (d) 2000
  16. 16.Which is closest to 1497 ÷ 49? (a) 30 (b) 60 (c) 300 (d) 15
  17. 17.Round 99159 to the nearest ten.
  18. 18.Round 66737 to the nearest ten.
  19. 19.Round 62532 to the nearest hundred.
  20. 20.Round 26.39 to one decimal place. =
  21. 21.Which is closest to 801 × 92? (Round each number first.) (a) 72000 (b) 720000 (c) 144000 (d) 7200
  22. 22.Which is closest to 496 × 72? (Round each number first.) (a) 70000 (b) 35000 (c) 3500 (d) 350000
  23. 23.Which is closest to 2000 ÷ 39? (a) 50 (b) 25 (c) 100 (d) 500
  24. 24.Round 16504 to the nearest hundred.
  25. 25.Round 74.42 to one decimal place. =
  26. 26.Round 99.57 to one decimal place. =
  27. 27.Round 67823 to the nearest hundred.
  28. 28.Which is closest to 396 + 800 + 401? (a) 1500 (b) 1600 (c) 1800 (d) 1700
  29. 29.Which is closest to 299 × 31? (Round each number first.) (a) 18000 (b) 900 (c) 9000 (d) 90000
  30. 30.Which is closest to 595 + 901 + 903? (a) 2300 (b) 2600 (c) 2500 (d) 2400
  31. 31.Which is closest to 499 × 18? (Round each number first.) (a) 1000 (b) 20000 (c) 10000 (d) 100000
  32. 32.Which is closest to 797 × 80? (Round each number first.) (a) 6400 (b) 128000 (c) 640000 (d) 64000
  33. 33.Which is closest to 301 × 39? (Round each number first.) (a) 1200 (b) 12000 (c) 120000 (d) 24000
  34. 34.Round 19363 to the nearest ten.
  35. 35.Which is closest to 105 + 400 + 796? (a) 1200 (b) 1500 (c) 1300 (d) 1400
  36. 36.Which is closest to 803 + 296 + 303? (a) 1600 (b) 1500 (c) 1300 (d) 1400
  37. 37.Which is closest to 195 + 304 + 501? (a) 1100 (b) 1000 (c) 900 (d) 1200
  38. 38.Which is closest to 595 ÷ 21? (a) 15 (b) 300 (c) 30 (d) 60
  39. 39.Round 67.61 to one decimal place. =
  40. 40.Round 10.06 to one decimal place. =

Answer key

  1. 6000
  2. 97520
  3. 66.6
  4. 92.7
  5. 90
  6. 30000
  7. 50
  8. 27000
  9. 1100
  10. 20
  11. 40
  12. 99000
  13. 26.7
  14. 52.6
  15. 1900
  16. 30
  17. 99160
  18. 66740
  19. 62500
  20. 26.4
  21. 72000
  22. 35000
  23. 50
  24. 16500
  25. 74.4
  26. 99.6
  27. 67800
  28. 1600
  29. 9000
  30. 2400
  31. 10000
  32. 64000
  33. 12000
  34. 19360
  35. 1300
  36. 1400
  37. 1000
  38. 30
  39. 67.6
  40. 10.1

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