← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 894 · 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 61.59 to one decimal place. =
  2. 2.Round 34268 to the nearest thousand.
  3. 3.Which is closest to 901 + 297 + 904? (a) 2300 (b) 2000 (c) 2100 (d) 2200
  4. 4.Round 92.62 to one decimal place. =
  5. 5.Which is closest to 605 + 704 + 96? (a) 1300 (b) 1400 (c) 1600 (d) 1500
  6. 6.Which is closest to 696 × 58? (Round each number first.) (a) 4200 (b) 42000 (c) 420000 (d) 84000
  7. 7.Round 72.43 to one decimal place. =
  8. 8.Which is closest to 1597 ÷ 39? (a) 40 (b) 20 (c) 400 (d) 80
  9. 9.Round 25.93 to one decimal place. =
  10. 10.Round 83.12 to one decimal place. =
  11. 11.Round 39358 to the nearest hundred.
  12. 12.Which is closest to 805 + 600 + 199? (a) 1500 (b) 1700 (c) 1800 (d) 1600
  13. 13.Which is closest to 699 × 40? (Round each number first.) (a) 28000 (b) 2800 (c) 56000 (d) 280000
  14. 14.Which is closest to 901 × 80? (Round each number first.) (a) 72000 (b) 144000 (c) 720000 (d) 7200
  15. 15.Round 83.36 to one decimal place. =
  16. 16.Round 10.66 to one decimal place. =
  17. 17.Which is closest to 200 × 38? (Round each number first.) (a) 8000 (b) 80000 (c) 800 (d) 16000
  18. 18.Round 30.73 to one decimal place. =
  19. 19.Round 26249 to the nearest ten.
  20. 20.Which is closest to 402 × 18? (Round each number first.) (a) 16000 (b) 8000 (c) 80000 (d) 800
  21. 21.Which is closest to 596 × 81? (Round each number first.) (a) 48000 (b) 480000 (c) 4800 (d) 96000
  22. 22.Round 83187 to the nearest ten.
  23. 23.Round 79.67 to one decimal place. =
  24. 24.Round 14.56 to one decimal place. =
  25. 25.Which is closest to 102 + 696 + 199? (a) 1200 (b) 1100 (c) 900 (d) 1000
  26. 26.Round 47.16 to one decimal place. =
  27. 27.Round 45.06 to one decimal place. =
  28. 28.Round 68.84 to one decimal place. =
  29. 29.Which is closest to 1203 ÷ 29? (a) 80 (b) 400 (c) 20 (d) 40
  30. 30.Which is closest to 898 + 499 + 897? (a) 2200 (b) 2300 (c) 2500 (d) 2400
  31. 31.Which is closest to 500 + 895 + 796? (a) 2100 (b) 2200 (c) 2400 (d) 2300
  32. 32.Round 97.78 to one decimal place. =
  33. 33.Which is closest to 503 + 695 + 100? (a) 1300 (b) 1200 (c) 1400 (d) 1500
  34. 34.Which is closest to 402 + 400 + 99? (a) 1000 (b) 800 (c) 1100 (d) 900
  35. 35.Which is closest to 699 + 797 + 601? (a) 2000 (b) 2100 (c) 2200 (d) 2300
  36. 36.Round 84.32 to one decimal place. =
  37. 37.Which is closest to 704 × 21? (Round each number first.) (a) 28000 (b) 1400 (c) 14000 (d) 140000
  38. 38.Which is closest to 401 + 296 + 700? (a) 1600 (b) 1300 (c) 1400 (d) 1500
  39. 39.Which is closest to 896 × 18? (Round each number first.) (a) 180000 (b) 18000 (c) 1800 (d) 36000
  40. 40.Which is closest to 2409 ÷ 41? (a) 120 (b) 30 (c) 600 (d) 60

Answer key

  1. 61.6
  2. 34000
  3. 2100
  4. 92.6
  5. 1400
  6. 42000
  7. 72.4
  8. 40
  9. 25.9
  10. 83.1
  11. 39400
  12. 1600
  13. 28000
  14. 72000
  15. 83.4
  16. 10.7
  17. 8000
  18. 30.7
  19. 26250
  20. 8000
  21. 48000
  22. 83190
  23. 79.7
  24. 14.6
  25. 1000
  26. 47.2
  27. 45.1
  28. 68.8
  29. 40
  30. 2300
  31. 2200
  32. 97.8
  33. 1300
  34. 900
  35. 2100
  36. 84.3
  37. 14000
  38. 1400
  39. 18000
  40. 60

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