← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 269 · 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 695 + 398 + 295? (a) 1600 (b) 1500 (c) 1300 (d) 1400
  2. 2.Which is closest to 498 × 90? (Round each number first.) (a) 4500 (b) 45000 (c) 450000 (d) 90000
  3. 3.Round 66.51 to one decimal place. =
  4. 4.Round 13.66 to one decimal place. =
  5. 5.Round 72.67 to one decimal place. =
  6. 6.Which is closest to 798 × 68? (Round each number first.) (a) 560000 (b) 112000 (c) 5600 (d) 56000
  7. 7.Which is closest to 397 + 805 + 299? (a) 1600 (b) 1400 (c) 1700 (d) 1500
  8. 8.Which is closest to 897 × 28? (Round each number first.) (a) 27000 (b) 270000 (c) 54000 (d) 2700
  9. 9.Which is closest to 203 × 68? (Round each number first.) (a) 140000 (b) 14000 (c) 28000 (d) 1400
  10. 10.Round 82.91 to one decimal place. =
  11. 11.Which is closest to 803 × 59? (Round each number first.) (a) 480000 (b) 48000 (c) 4800 (d) 96000
  12. 12.Round 72.51 to one decimal place. =
  13. 13.Round 64.52 to one decimal place. =
  14. 14.Which is closest to 1791 ÷ 29? (a) 30 (b) 600 (c) 60 (d) 120
  15. 15.Round 53102 to the nearest hundred.
  16. 16.Which is closest to 195 + 703 + 105? (a) 1100 (b) 900 (c) 1200 (d) 1000
  17. 17.Which is closest to 999 ÷ 49? (a) 20 (b) 10 (c) 40 (d) 200
  18. 18.Round 30.76 to one decimal place. =
  19. 19.Round 25.94 to one decimal place. =
  20. 20.Round 38768 to the nearest thousand.
  21. 21.Round 84.53 to one decimal place. =
  22. 22.Which is closest to 1391 ÷ 19? (a) 70 (b) 140 (c) 700 (d) 35
  23. 23.Which is closest to 1502 ÷ 29? (a) 500 (b) 100 (c) 25 (d) 50
  24. 24.Which is closest to 802 × 39? (Round each number first.) (a) 3200 (b) 32000 (c) 320000 (d) 64000
  25. 25.Which is closest to 200 × 79? (Round each number first.) (a) 160000 (b) 32000 (c) 16000 (d) 1600
  26. 26.Which is closest to 704 × 79? (Round each number first.) (a) 5600 (b) 560000 (c) 112000 (d) 56000
  27. 27.Which is closest to 399 + 695 + 701? (a) 1900 (b) 1800 (c) 1700 (d) 2000
  28. 28.Which is closest to 898 × 88? (Round each number first.) (a) 8100 (b) 810000 (c) 162000 (d) 81000
  29. 29.Which is closest to 199 × 68? (Round each number first.) (a) 140000 (b) 28000 (c) 14000 (d) 1400
  30. 30.Which is closest to 899 × 69? (Round each number first.) (a) 126000 (b) 630000 (c) 6300 (d) 63000
  31. 31.Which is closest to 2009 ÷ 49? (a) 400 (b) 20 (c) 80 (d) 40
  32. 32.Round 81.73 to one decimal place. =
  33. 33.Round 20.64 to one decimal place. =
  34. 34.Round 51122 to the nearest ten.
  35. 35.Round 58.66 to one decimal place. =
  36. 36.Which is closest to 2108 ÷ 29? (a) 700 (b) 35 (c) 70 (d) 140
  37. 37.Round 28.74 to one decimal place. =
  38. 38.Round 14.66 to one decimal place. =
  39. 39.Round 50254 to the nearest ten.
  40. 40.Round 38.76 to one decimal place. =

Answer key

  1. 1400
  2. 45000
  3. 66.5
  4. 13.7
  5. 72.7
  6. 56000
  7. 1500
  8. 27000
  9. 14000
  10. 82.9
  11. 48000
  12. 72.5
  13. 64.5
  14. 60
  15. 53100
  16. 1000
  17. 20
  18. 30.8
  19. 25.9
  20. 39000
  21. 84.5
  22. 70
  23. 50
  24. 32000
  25. 16000
  26. 56000
  27. 1800
  28. 81000
  29. 14000
  30. 63000
  31. 40
  32. 81.7
  33. 20.6
  34. 51120
  35. 58.7
  36. 70
  37. 28.7
  38. 14.7
  39. 50250
  40. 38.8

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