← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 675 · 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.Round 63949 to the nearest ten.
  2. 2.Round 42.26 to one decimal place. =
  3. 3.Round 22.49 to one decimal place. =
  4. 4.Which is closest to 302 × 79? (Round each number first.) (a) 48000 (b) 240000 (c) 2400 (d) 24000
  5. 5.Which is closest to 202 × 89? (Round each number first.) (a) 18000 (b) 1800 (c) 180000 (d) 36000
  6. 6.Round 50093 to the nearest hundred.
  7. 7.Which is closest to 204 + 101 + 196? (a) 500 (b) 400 (c) 600 (d) 700
  8. 8.Round 14380 to the nearest hundred.
  9. 9.Which is closest to 1602 ÷ 41? (a) 400 (b) 40 (c) 20 (d) 80
  10. 10.Round 99.56 to one decimal place. =
  11. 11.Round 57.91 to one decimal place. =
  12. 12.Which is closest to 499 + 801 + 901? (a) 2400 (b) 2300 (c) 2200 (d) 2100
  13. 13.Which is closest to 600 × 31? (Round each number first.) (a) 180000 (b) 1800 (c) 36000 (d) 18000
  14. 14.Which is closest to 3593 ÷ 41? (a) 45 (b) 90 (c) 900 (d) 180
  15. 15.Round 68.83 to one decimal place. =
  16. 16.Round 3249 to the nearest ten.
  17. 17.Which is closest to 803 + 605 + 597? (a) 1900 (b) 2000 (c) 2100 (d) 2200
  18. 18.Which is closest to 600 + 895 + 197? (a) 1600 (b) 1700 (c) 1900 (d) 1800
  19. 19.Round 19.83 to one decimal place. =
  20. 20.Round 87710 to the nearest thousand.
  21. 21.Round 11591 to the nearest hundred.
  22. 22.Which is closest to 298 × 92? (Round each number first.) (a) 2700 (b) 27000 (c) 270000 (d) 54000
  23. 23.Which is closest to 402 + 699 + 300? (a) 1500 (b) 1600 (c) 1400 (d) 1300
  24. 24.Which is closest to 1606 ÷ 19? (a) 40 (b) 80 (c) 800 (d) 160
  25. 25.Which is closest to 305 + 904 + 796? (a) 2200 (b) 1900 (c) 2000 (d) 2100
  26. 26.Which is closest to 98 + 795 + 505? (a) 1300 (b) 1600 (c) 1500 (d) 1400
  27. 27.Round 91.53 to one decimal place. =
  28. 28.Round 28.23 to one decimal place. =
  29. 29.Which is closest to 4494 ÷ 51? (a) 45 (b) 180 (c) 90 (d) 900
  30. 30.Which is closest to 897 × 50? (Round each number first.) (a) 4500 (b) 45000 (c) 90000 (d) 450000
  31. 31.Which is closest to 799 × 30? (Round each number first.) (a) 2400 (b) 240000 (c) 24000 (d) 48000
  32. 32.Round 76782 to the nearest hundred.
  33. 33.Round 77329 to the nearest ten.
  34. 34.Which is closest to 4002 ÷ 49? (a) 160 (b) 40 (c) 800 (d) 80
  35. 35.Which is closest to 2797 ÷ 39? (a) 700 (b) 70 (c) 35 (d) 140
  36. 36.Round 59.16 to one decimal place. =
  37. 37.Which is closest to 505 + 895 + 103? (a) 1400 (b) 1700 (c) 1600 (d) 1500
  38. 38.Round 66.12 to one decimal place. =
  39. 39.Which is closest to 602 × 52? (Round each number first.) (a) 60000 (b) 3000 (c) 30000 (d) 300000
  40. 40.Which is closest to 1795 ÷ 21? (a) 90 (b) 45 (c) 900 (d) 180

Answer key

  1. 63950
  2. 42.3
  3. 22.5
  4. 24000
  5. 18000
  6. 50100
  7. 500
  8. 14400
  9. 40
  10. 99.6
  11. 57.9
  12. 2200
  13. 18000
  14. 90
  15. 68.8
  16. 3250
  17. 2000
  18. 1700
  19. 19.8
  20. 88000
  21. 11600
  22. 27000
  23. 1400
  24. 80
  25. 2000
  26. 1400
  27. 91.5
  28. 28.2
  29. 90
  30. 45000
  31. 24000
  32. 76800
  33. 77330
  34. 80
  35. 70
  36. 59.2
  37. 1500
  38. 66.1
  39. 30000
  40. 90

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