← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 805 · 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 499 × 72? (Round each number first.) (a) 3500 (b) 35000 (c) 70000 (d) 350000
  2. 2.Which is closest to 498 × 38? (Round each number first.) (a) 200000 (b) 20000 (c) 40000 (d) 2000
  3. 3.Round 30.07 to one decimal place. =
  4. 4.Round 92242 to the nearest hundred.
  5. 5.Round 5007 to the nearest ten.
  6. 6.Which is closest to 296 + 404 + 101? (a) 1000 (b) 800 (c) 700 (d) 900
  7. 7.Which is closest to 700 + 900 + 805? (a) 2600 (b) 2400 (c) 2300 (d) 2500
  8. 8.Which is closest to 204 + 204 + 300? (a) 900 (b) 600 (c) 700 (d) 800
  9. 9.Which is closest to 102 + 198 + 298? (a) 500 (b) 800 (c) 700 (d) 600
  10. 10.Which is closest to 902 + 195 + 295? (a) 1400 (b) 1600 (c) 1500 (d) 1300
  11. 11.Round 57.36 to one decimal place. =
  12. 12.Which is closest to 591 ÷ 29? (a) 10 (b) 200 (c) 40 (d) 20
  13. 13.Which is closest to 1798 ÷ 19? (a) 45 (b) 180 (c) 90 (d) 900
  14. 14.Which is closest to 598 × 32? (Round each number first.) (a) 18000 (b) 36000 (c) 180000 (d) 1800
  15. 15.Which is closest to 499 × 70? (Round each number first.) (a) 3500 (b) 350000 (c) 70000 (d) 35000
  16. 16.Round 55.24 to one decimal place. =
  17. 17.Which is closest to 499 + 297 + 104? (a) 1100 (b) 900 (c) 1000 (d) 800
  18. 18.Which is closest to 597 × 18? (Round each number first.) (a) 24000 (b) 1200 (c) 120000 (d) 12000
  19. 19.Which is closest to 703 × 48? (Round each number first.) (a) 3500 (b) 350000 (c) 70000 (d) 35000
  20. 20.Round 21848 to the nearest hundred.
  21. 21.Which is closest to 197 × 61? (Round each number first.) (a) 24000 (b) 1200 (c) 120000 (d) 12000
  22. 22.Round 14532 to the nearest thousand.
  23. 23.Which is closest to 799 × 70? (Round each number first.) (a) 56000 (b) 5600 (c) 112000 (d) 560000
  24. 24.Which is closest to 605 ÷ 19? (a) 30 (b) 300 (c) 15 (d) 60
  25. 25.Round 73.69 to one decimal place. =
  26. 26.Which is closest to 101 + 98 + 505? (a) 600 (b) 700 (c) 800 (d) 900
  27. 27.Which is closest to 401 × 70? (Round each number first.) (a) 280000 (b) 2800 (c) 56000 (d) 28000
  28. 28.Which is closest to 1608 ÷ 19? (a) 40 (b) 160 (c) 80 (d) 800
  29. 29.Round 50.83 to one decimal place. =
  30. 30.Which is closest to 195 + 701 + 797? (a) 1800 (b) 1600 (c) 1900 (d) 1700
  31. 31.Round 59759 to the nearest hundred.
  32. 32.Round 69273 to the nearest ten.
  33. 33.Which is closest to 1994 ÷ 39? (a) 100 (b) 500 (c) 50 (d) 25
  34. 34.Round 54.89 to one decimal place. =
  35. 35.Which is closest to 698 + 604 + 299? (a) 1700 (b) 1500 (c) 1800 (d) 1600
  36. 36.Round 74755 to the nearest hundred.
  37. 37.Round 28520 to the nearest hundred.
  38. 38.Round 17626 to the nearest ten.
  39. 39.Which is closest to 3596 ÷ 41? (a) 90 (b) 180 (c) 900 (d) 45
  40. 40.Round 38.67 to one decimal place. =

Answer key

  1. 35000
  2. 20000
  3. 30.1
  4. 92200
  5. 5010
  6. 800
  7. 2400
  8. 700
  9. 600
  10. 1400
  11. 57.4
  12. 20
  13. 90
  14. 18000
  15. 35000
  16. 55.2
  17. 900
  18. 12000
  19. 35000
  20. 21800
  21. 12000
  22. 15000
  23. 56000
  24. 30
  25. 73.7
  26. 700
  27. 28000
  28. 80
  29. 50.8
  30. 1700
  31. 59800
  32. 69270
  33. 50
  34. 54.9
  35. 1600
  36. 74800
  37. 28500
  38. 17630
  39. 90
  40. 38.7

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