← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 528 · 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 599 + 596 + 503? (a) 1800 (b) 1700 (c) 1900 (d) 1600
  2. 2.Round 60.73 to one decimal place. =
  3. 3.Which is closest to 102 + 300 + 800? (a) 1400 (b) 1300 (c) 1200 (d) 1100
  4. 4.Which is closest to 897 × 72? (Round each number first.) (a) 63000 (b) 6300 (c) 126000 (d) 630000
  5. 5.Which is closest to 900 + 795 + 798? (a) 2600 (b) 2700 (c) 2400 (d) 2500
  6. 6.Round 39.41 to one decimal place. =
  7. 7.Which is closest to 298 × 18? (Round each number first.) (a) 12000 (b) 6000 (c) 60000 (d) 600
  8. 8.Round 92.84 to one decimal place. =
  9. 9.Round 44.24 to one decimal place. =
  10. 10.Round 7554 to the nearest ten.
  11. 11.Round 15.81 to one decimal place. =
  12. 12.Which is closest to 1996 ÷ 41? (a) 50 (b) 25 (c) 100 (d) 500
  13. 13.Which is closest to 97 + 305 + 105? (a) 500 (b) 700 (c) 400 (d) 600
  14. 14.Which is closest to 600 × 89? (Round each number first.) (a) 5400 (b) 54000 (c) 540000 (d) 108000
  15. 15.Round 89.92 to one decimal place. =
  16. 16.Round 88.83 to one decimal place. =
  17. 17.Round 70.94 to one decimal place. =
  18. 18.Which is closest to 297 + 98 + 98? (a) 600 (b) 500 (c) 700 (d) 400
  19. 19.Which is closest to 501 × 91? (Round each number first.) (a) 90000 (b) 4500 (c) 45000 (d) 450000
  20. 20.Round 66.07 to one decimal place. =
  21. 21.Round 20641 to the nearest thousand.
  22. 22.Which is closest to 197 × 81? (Round each number first.) (a) 32000 (b) 16000 (c) 160000 (d) 1600
  23. 23.Which is closest to 798 + 603 + 795? (a) 2100 (b) 2200 (c) 2400 (d) 2300
  24. 24.Which is closest to 2402 ÷ 29? (a) 80 (b) 160 (c) 40 (d) 800
  25. 25.Round 42.47 to one decimal place. =
  26. 26.Which is closest to 398 + 695 + 398? (a) 1700 (b) 1400 (c) 1600 (d) 1500
  27. 27.Round 16.86 to one decimal place. =
  28. 28.Round 48.69 to one decimal place. =
  29. 29.Which is closest to 295 + 700 + 795? (a) 1900 (b) 2000 (c) 1700 (d) 1800
  30. 30.Round 92.33 to one decimal place. =
  31. 31.Which is closest to 500 × 92? (Round each number first.) (a) 45000 (b) 450000 (c) 4500 (d) 90000
  32. 32.Round 59068 to the nearest ten.
  33. 33.Round 81.72 to one decimal place. =
  34. 34.Which is closest to 697 × 81? (Round each number first.) (a) 56000 (b) 560000 (c) 112000 (d) 5600
  35. 35.Which is closest to 397 + 398 + 899? (a) 1900 (b) 1600 (c) 1800 (d) 1700
  36. 36.Which is closest to 903 + 205 + 200? (a) 1300 (b) 1400 (c) 1200 (d) 1500
  37. 37.Round 39.12 to one decimal place. =
  38. 38.Round 56378 to the nearest hundred.
  39. 39.Round 7998 to the nearest ten.
  40. 40.Round 11271 to the nearest hundred.

Answer key

  1. 1700
  2. 60.7
  3. 1200
  4. 63000
  5. 2500
  6. 39.4
  7. 6000
  8. 92.8
  9. 44.2
  10. 7550
  11. 15.8
  12. 50
  13. 500
  14. 54000
  15. 89.9
  16. 88.8
  17. 70.9
  18. 500
  19. 45000
  20. 66.1
  21. 21000
  22. 16000
  23. 2200
  24. 80
  25. 42.5
  26. 1500
  27. 16.9
  28. 48.7
  29. 1800
  30. 92.3
  31. 45000
  32. 59070
  33. 81.7
  34. 56000
  35. 1700
  36. 1300
  37. 39.1
  38. 56400
  39. 8000
  40. 11300

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