← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 557 · 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.Round 37838 to the nearest ten.
  2. 2.Which is closest to 1601 ÷ 19? (a) 160 (b) 800 (c) 80 (d) 40
  3. 3.Round 80566 to the nearest hundred.
  4. 4.Round 10.41 to one decimal place. =
  5. 5.Which is closest to 298 + 902 + 197? (a) 1400 (b) 1300 (c) 1600 (d) 1500
  6. 6.Which is closest to 602 + 97 + 196? (a) 1000 (b) 1100 (c) 900 (d) 800
  7. 7.Round 59.46 to one decimal place. =
  8. 8.Which is closest to 296 × 58? (Round each number first.) (a) 1800 (b) 36000 (c) 18000 (d) 180000
  9. 9.Which is closest to 398 × 58? (Round each number first.) (a) 2400 (b) 48000 (c) 240000 (d) 24000
  10. 10.Which is closest to 297 × 42? (Round each number first.) (a) 1200 (b) 120000 (c) 12000 (d) 24000
  11. 11.Round 20.14 to one decimal place. =
  12. 12.Which is closest to 1207 ÷ 29? (a) 40 (b) 400 (c) 80 (d) 20
  13. 13.Which is closest to 396 + 205 + 803? (a) 1600 (b) 1500 (c) 1300 (d) 1400
  14. 14.Which is closest to 1196 ÷ 19? (a) 60 (b) 600 (c) 30 (d) 120
  15. 15.Which is closest to 400 ÷ 21? (a) 40 (b) 20 (c) 10 (d) 200
  16. 16.Which is closest to 495 + 899 + 495? (a) 1800 (b) 2000 (c) 2100 (d) 1900
  17. 17.Which is closest to 791 ÷ 21? (a) 80 (b) 400 (c) 40 (d) 20
  18. 18.Which is closest to 900 × 91? (Round each number first.) (a) 8100 (b) 81000 (c) 162000 (d) 810000
  19. 19.Round 73829 to the nearest thousand.
  20. 20.Which is closest to 501 × 82? (Round each number first.) (a) 400000 (b) 4000 (c) 80000 (d) 40000
  21. 21.Which is closest to 198 × 82? (Round each number first.) (a) 32000 (b) 16000 (c) 160000 (d) 1600
  22. 22.Round 48.11 to one decimal place. =
  23. 23.Which is closest to 1494 ÷ 29? (a) 25 (b) 100 (c) 500 (d) 50
  24. 24.Which is closest to 895 + 198 + 198? (a) 1300 (b) 1500 (c) 1400 (d) 1200
  25. 25.Which is closest to 593 ÷ 19? (a) 60 (b) 30 (c) 15 (d) 300
  26. 26.Round 62389 to the nearest hundred.
  27. 27.Round 24512 to the nearest thousand.
  28. 28.Round 16457 to the nearest hundred.
  29. 29.Which is closest to 496 × 91? (Round each number first.) (a) 90000 (b) 45000 (c) 4500 (d) 450000
  30. 30.Which is closest to 800 ÷ 21? (a) 20 (b) 400 (c) 40 (d) 80
  31. 31.Round 52.38 to one decimal place. =
  32. 32.Which is closest to 1391 ÷ 21? (a) 140 (b) 700 (c) 35 (d) 70
  33. 33.Round 91.26 to one decimal place. =
  34. 34.Which is closest to 797 × 59? (Round each number first.) (a) 96000 (b) 480000 (c) 48000 (d) 4800
  35. 35.Which is closest to 401 + 896 + 499? (a) 1700 (b) 2000 (c) 1900 (d) 1800
  36. 36.Round 58658 to the nearest hundred.
  37. 37.Which is closest to 396 × 92? (Round each number first.) (a) 36000 (b) 3600 (c) 360000 (d) 72000
  38. 38.Which is closest to 905 + 597 + 797? (a) 2300 (b) 2200 (c) 2400 (d) 2500
  39. 39.Round 58.77 to one decimal place. =
  40. 40.Which is closest to 302 × 91? (Round each number first.) (a) 2700 (b) 270000 (c) 54000 (d) 27000

Answer key

  1. 37840
  2. 80
  3. 80600
  4. 10.4
  5. 1400
  6. 900
  7. 59.5
  8. 18000
  9. 24000
  10. 12000
  11. 20.1
  12. 40
  13. 1400
  14. 60
  15. 20
  16. 1900
  17. 40
  18. 81000
  19. 74000
  20. 40000
  21. 16000
  22. 48.1
  23. 50
  24. 1300
  25. 30
  26. 62400
  27. 25000
  28. 16500
  29. 45000
  30. 40
  31. 52.4
  32. 70
  33. 91.3
  34. 48000
  35. 1800
  36. 58700
  37. 36000
  38. 2300
  39. 58.8
  40. 27000

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