← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 807 · 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 496 × 72? (Round each number first.) (a) 3500 (b) 70000 (c) 35000 (d) 350000
  2. 2.Round 38827 to the nearest ten.
  3. 3.Round 17878 to the nearest thousand.
  4. 4.Round 22378 to the nearest hundred.
  5. 5.Round 78621 to the nearest hundred.
  6. 6.Which is closest to 297 × 21? (Round each number first.) (a) 12000 (b) 60000 (c) 600 (d) 6000
  7. 7.Which is closest to 1797 ÷ 21? (a) 45 (b) 900 (c) 90 (d) 180
  8. 8.Which is closest to 4502 ÷ 51? (a) 900 (b) 180 (c) 90 (d) 45
  9. 9.Round 40.66 to one decimal place. =
  10. 10.Round 91248 to the nearest thousand.
  11. 11.Which is closest to 496 + 597 + 701? (a) 1800 (b) 1700 (c) 2000 (d) 1900
  12. 12.Round 23.57 to one decimal place. =
  13. 13.Which is closest to 204 × 38? (Round each number first.) (a) 8000 (b) 800 (c) 80000 (d) 16000
  14. 14.Which is closest to 603 + 895 + 398? (a) 1900 (b) 2100 (c) 1800 (d) 2000
  15. 15.Which is closest to 4501 ÷ 49? (a) 900 (b) 180 (c) 45 (d) 90
  16. 16.Which is closest to 4508 ÷ 49? (a) 900 (b) 180 (c) 45 (d) 90
  17. 17.Which is closest to 497 + 401 + 603? (a) 1600 (b) 1400 (c) 1500 (d) 1700
  18. 18.Which is closest to 701 × 19? (Round each number first.) (a) 140000 (b) 1400 (c) 28000 (d) 14000
  19. 19.Which is closest to 4508 ÷ 51? (a) 180 (b) 45 (c) 900 (d) 90
  20. 20.Which is closest to 605 ÷ 21? (a) 60 (b) 15 (c) 300 (d) 30
  21. 21.Round 8111 to the nearest ten.
  22. 22.Which is closest to 802 ÷ 41? (a) 40 (b) 10 (c) 20 (d) 200
  23. 23.Which is closest to 705 + 205 + 202? (a) 1200 (b) 1000 (c) 1300 (d) 1100
  24. 24.Which is closest to 201 × 91? (Round each number first.) (a) 18000 (b) 180000 (c) 36000 (d) 1800
  25. 25.Round 38.46 to one decimal place. =
  26. 26.Round 79.19 to one decimal place. =
  27. 27.Round 96.77 to one decimal place. =
  28. 28.Round 14.59 to one decimal place. =
  29. 29.Which is closest to 1997 ÷ 51? (a) 400 (b) 80 (c) 20 (d) 40
  30. 30.Round 84274 to the nearest ten.
  31. 31.Which is closest to 1199 ÷ 19? (a) 120 (b) 30 (c) 600 (d) 60
  32. 32.Round 91.59 to one decimal place. =
  33. 33.Which is closest to 1509 ÷ 51? (a) 60 (b) 300 (c) 30 (d) 15
  34. 34.Round 40.59 to one decimal place. =
  35. 35.Which is closest to 201 × 52? (Round each number first.) (a) 10000 (b) 100000 (c) 20000 (d) 1000
  36. 36.Which is closest to 695 + 303 + 596? (a) 1600 (b) 1800 (c) 1500 (d) 1700
  37. 37.Round 92.29 to one decimal place. =
  38. 38.Which is closest to 392 ÷ 19? (a) 40 (b) 10 (c) 20 (d) 200
  39. 39.Round 60.32 to one decimal place. =
  40. 40.Round 16813 to the nearest hundred.

Answer key

  1. 35000
  2. 38830
  3. 18000
  4. 22400
  5. 78600
  6. 6000
  7. 90
  8. 90
  9. 40.7
  10. 91000
  11. 1800
  12. 23.6
  13. 8000
  14. 1900
  15. 90
  16. 90
  17. 1500
  18. 14000
  19. 90
  20. 30
  21. 8110
  22. 20
  23. 1100
  24. 18000
  25. 38.5
  26. 79.2
  27. 96.8
  28. 14.6
  29. 40
  30. 84270
  31. 60
  32. 91.6
  33. 30
  34. 40.6
  35. 10000
  36. 1600
  37. 92.3
  38. 20
  39. 60.3
  40. 16800

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