← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 25 · 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 700 + 899 + 302? (a) 1900 (b) 2000 (c) 1800 (d) 2100
  2. 2.Which is closest to 498 × 61? (Round each number first.) (a) 60000 (b) 30000 (c) 300000 (d) 3000
  3. 3.Round 27899 to the nearest thousand.
  4. 4.Which is closest to 2999 ÷ 51? (a) 600 (b) 60 (c) 120 (d) 30
  5. 5.Round 2252 to the nearest thousand.
  6. 6.Round 39687 to the nearest hundred.
  7. 7.Round 11.43 to one decimal place. =
  8. 8.Which is closest to 599 × 59? (Round each number first.) (a) 360000 (b) 3600 (c) 72000 (d) 36000
  9. 9.Which is closest to 2802 ÷ 39? (a) 140 (b) 35 (c) 700 (d) 70
  10. 10.Round 53349 to the nearest ten.
  11. 11.Which is closest to 1495 ÷ 29? (a) 500 (b) 100 (c) 25 (d) 50
  12. 12.Round 90791 to the nearest ten.
  13. 13.Round 21.11 to one decimal place. =
  14. 14.Which is closest to 703 + 597 + 405? (a) 1700 (b) 1900 (c) 1800 (d) 1600
  15. 15.Which is closest to 2994 ÷ 51? (a) 60 (b) 120 (c) 600 (d) 30
  16. 16.Which is closest to 801 × 91? (Round each number first.) (a) 7200 (b) 72000 (c) 144000 (d) 720000
  17. 17.Which is closest to 205 + 101 + 397? (a) 700 (b) 900 (c) 800 (d) 600
  18. 18.Round 83332 to the nearest ten.
  19. 19.Round 70149 to the nearest ten.
  20. 20.Round 3619 to the nearest ten.
  21. 21.Which is closest to 196 × 80? (Round each number first.) (a) 32000 (b) 16000 (c) 1600 (d) 160000
  22. 22.Which is closest to 204 + 895 + 898? (a) 1900 (b) 2100 (c) 2200 (d) 2000
  23. 23.Round 64.44 to one decimal place. =
  24. 24.Which is closest to 603 ÷ 29? (a) 40 (b) 200 (c) 10 (d) 20
  25. 25.Round 99837 to the nearest ten.
  26. 26.Round 7997 to the nearest thousand.
  27. 27.Which is closest to 901 + 403 + 103? (a) 1300 (b) 1600 (c) 1400 (d) 1500
  28. 28.Round 23566 to the nearest ten.
  29. 29.Which is closest to 599 × 39? (Round each number first.) (a) 240000 (b) 48000 (c) 24000 (d) 2400
  30. 30.Which is closest to 2398 ÷ 29? (a) 800 (b) 160 (c) 80 (d) 40
  31. 31.Which is closest to 699 × 91? (Round each number first.) (a) 630000 (b) 126000 (c) 6300 (d) 63000
  32. 32.Round 44.88 to one decimal place. =
  33. 33.Which is closest to 397 + 600 + 697? (a) 1600 (b) 1700 (c) 1900 (d) 1800
  34. 34.Which is closest to 202 × 79? (Round each number first.) (a) 1600 (b) 32000 (c) 16000 (d) 160000
  35. 35.Which is closest to 802 + 496 + 203? (a) 1700 (b) 1400 (c) 1600 (d) 1500
  36. 36.Which is closest to 601 + 98 + 495? (a) 1400 (b) 1200 (c) 1100 (d) 1300
  37. 37.Which is closest to 397 × 68? (Round each number first.) (a) 56000 (b) 280000 (c) 28000 (d) 2800
  38. 38.Round 9864 to the nearest hundred.
  39. 39.Round 81.41 to one decimal place. =
  40. 40.Which is closest to 1197 ÷ 29? (a) 40 (b) 20 (c) 400 (d) 80

Answer key

  1. 1900
  2. 30000
  3. 28000
  4. 60
  5. 2000
  6. 39700
  7. 11.4
  8. 36000
  9. 70
  10. 53350
  11. 50
  12. 90790
  13. 21.1
  14. 1700
  15. 60
  16. 72000
  17. 700
  18. 83330
  19. 70150
  20. 3620
  21. 16000
  22. 2000
  23. 64.4
  24. 20
  25. 99840
  26. 8000
  27. 1400
  28. 23570
  29. 24000
  30. 80
  31. 63000
  32. 44.9
  33. 1700
  34. 16000
  35. 1500
  36. 1200
  37. 28000
  38. 9900
  39. 81.4
  40. 40

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