← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 605 · 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 64.81 to one decimal place. =
  2. 2.Round 94905 to the nearest hundred.
  3. 3.Which is closest to 794 ÷ 21? (a) 20 (b) 40 (c) 400 (d) 80
  4. 4.Which is closest to 2091 ÷ 31? (a) 70 (b) 35 (c) 700 (d) 140
  5. 5.Which is closest to 1196 ÷ 21? (a) 60 (b) 120 (c) 30 (d) 600
  6. 6.Round 81.56 to one decimal place. =
  7. 7.Which is closest to 196 × 91? (Round each number first.) (a) 36000 (b) 1800 (c) 180000 (d) 18000
  8. 8.Round 17929 to the nearest thousand.
  9. 9.Which is closest to 104 + 896 + 597? (a) 1600 (b) 1500 (c) 1800 (d) 1700
  10. 10.Which is closest to 3503 ÷ 49? (a) 140 (b) 70 (c) 35 (d) 700
  11. 11.Round 15365 to the nearest hundred.
  12. 12.Which is closest to 599 × 40? (Round each number first.) (a) 240000 (b) 2400 (c) 48000 (d) 24000
  13. 13.Round 94790 to the nearest thousand.
  14. 14.Which is closest to 1402 ÷ 21? (a) 140 (b) 700 (c) 70 (d) 35
  15. 15.Which is closest to 807 ÷ 21? (a) 20 (b) 80 (c) 40 (d) 400
  16. 16.Which is closest to 799 ÷ 21? (a) 40 (b) 20 (c) 80 (d) 400
  17. 17.Round 42846 to the nearest thousand.
  18. 18.Which is closest to 700 + 296 + 497? (a) 1700 (b) 1600 (c) 1400 (d) 1500
  19. 19.Which is closest to 994 ÷ 51? (a) 200 (b) 40 (c) 10 (d) 20
  20. 20.Which is closest to 602 + 702 + 896? (a) 2400 (b) 2200 (c) 2300 (d) 2100
  21. 21.Round 47.12 to one decimal place. =
  22. 22.Which is closest to 198 + 202 + 601? (a) 1200 (b) 1100 (c) 900 (d) 1000
  23. 23.Which is closest to 801 × 48? (Round each number first.) (a) 80000 (b) 400000 (c) 4000 (d) 40000
  24. 24.Round 10.34 to one decimal place. =
  25. 25.Which is closest to 603 + 796 + 500? (a) 2100 (b) 1800 (c) 2000 (d) 1900
  26. 26.Which is closest to 1505 ÷ 31? (a) 25 (b) 50 (c) 100 (d) 500
  27. 27.Round 93.38 to one decimal place. =
  28. 28.Round 29227 to the nearest thousand.
  29. 29.Which is closest to 703 × 58? (Round each number first.) (a) 420000 (b) 84000 (c) 42000 (d) 4200
  30. 30.Which is closest to 1397 ÷ 21? (a) 700 (b) 35 (c) 140 (d) 70
  31. 31.Round 56.77 to one decimal place. =
  32. 32.Round 33088 to the nearest hundred.
  33. 33.Which is closest to 798 + 296 + 903? (a) 2200 (b) 2000 (c) 1900 (d) 2100
  34. 34.Which is closest to 2505 ÷ 49? (a) 500 (b) 100 (c) 25 (d) 50
  35. 35.Which is closest to 896 ÷ 31? (a) 300 (b) 15 (c) 30 (d) 60
  36. 36.Which is closest to 299 × 40? (Round each number first.) (a) 120000 (b) 24000 (c) 12000 (d) 1200
  37. 37.Which is closest to 296 + 897 + 501? (a) 1800 (b) 1700 (c) 1900 (d) 1600
  38. 38.Which is closest to 894 ÷ 31? (a) 60 (b) 15 (c) 30 (d) 300
  39. 39.Which is closest to 603 + 795 + 599? (a) 1900 (b) 2100 (c) 2000 (d) 2200
  40. 40.Which is closest to 701 × 21? (Round each number first.) (a) 140000 (b) 1400 (c) 14000 (d) 28000

Answer key

  1. 64.8
  2. 94900
  3. 40
  4. 70
  5. 60
  6. 81.6
  7. 18000
  8. 18000
  9. 1600
  10. 70
  11. 15400
  12. 24000
  13. 95000
  14. 70
  15. 40
  16. 40
  17. 43000
  18. 1500
  19. 20
  20. 2200
  21. 47.1
  22. 1000
  23. 40000
  24. 10.3
  25. 1900
  26. 50
  27. 93.4
  28. 29000
  29. 42000
  30. 70
  31. 56.8
  32. 33100
  33. 2000
  34. 50
  35. 30
  36. 12000
  37. 1700
  38. 30
  39. 2000
  40. 14000

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