← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 267 · 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 98316 to the nearest hundred.
  2. 2.Round 22.56 to one decimal place. =
  3. 3.Which is closest to 196 + 203 + 96? (a) 400 (b) 700 (c) 500 (d) 600
  4. 4.Which is closest to 301 × 61? (Round each number first.) (a) 18000 (b) 1800 (c) 180000 (d) 36000
  5. 5.Which is closest to 1499 ÷ 51? (a) 60 (b) 30 (c) 300 (d) 15
  6. 6.Round 89.11 to one decimal place. =
  7. 7.Which is closest to 808 ÷ 41? (a) 20 (b) 200 (c) 40 (d) 10
  8. 8.Which is closest to 198 + 295 + 105? (a) 800 (b) 500 (c) 700 (d) 600
  9. 9.Which is closest to 602 × 78? (Round each number first.) (a) 4800 (b) 96000 (c) 48000 (d) 480000
  10. 10.Which is closest to 402 + 695 + 704? (a) 1900 (b) 1800 (c) 1700 (d) 2000
  11. 11.Which is closest to 804 × 42? (Round each number first.) (a) 64000 (b) 320000 (c) 3200 (d) 32000
  12. 12.Which is closest to 2699 ÷ 31? (a) 45 (b) 900 (c) 90 (d) 180
  13. 13.Round 25.27 to one decimal place. =
  14. 14.Which is closest to 1795 ÷ 29? (a) 30 (b) 60 (c) 600 (d) 120
  15. 15.Which is closest to 297 × 50? (Round each number first.) (a) 150000 (b) 15000 (c) 1500 (d) 30000
  16. 16.Round 6704 to the nearest ten.
  17. 17.Which is closest to 301 + 699 + 697? (a) 1700 (b) 1600 (c) 1900 (d) 1800
  18. 18.Which is closest to 603 + 98 + 398? (a) 1300 (b) 1000 (c) 1200 (d) 1100
  19. 19.Which is closest to 1197 ÷ 31? (a) 40 (b) 400 (c) 20 (d) 80
  20. 20.Round 65290 to the nearest thousand.
  21. 21.Which is closest to 299 + 699 + 395? (a) 1300 (b) 1400 (c) 1600 (d) 1500
  22. 22.Which is closest to 199 × 90? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
  23. 23.Which is closest to 900 × 49? (Round each number first.) (a) 450000 (b) 4500 (c) 90000 (d) 45000
  24. 24.Round 29.53 to one decimal place. =
  25. 25.Round 49.66 to one decimal place. =
  26. 26.Which is closest to 899 ÷ 31? (a) 15 (b) 60 (c) 300 (d) 30
  27. 27.Which is closest to 505 + 896 + 801? (a) 2400 (b) 2100 (c) 2200 (d) 2300
  28. 28.Which is closest to 199 × 71? (Round each number first.) (a) 14000 (b) 140000 (c) 28000 (d) 1400
  29. 29.Which is closest to 1799 ÷ 21? (a) 90 (b) 180 (c) 45 (d) 900
  30. 30.Which is closest to 2406 ÷ 39? (a) 600 (b) 120 (c) 30 (d) 60
  31. 31.Which is closest to 1793 ÷ 31? (a) 30 (b) 60 (c) 600 (d) 120
  32. 32.Round 89.44 to one decimal place. =
  33. 33.Which is closest to 995 ÷ 19? (a) 100 (b) 25 (c) 50 (d) 500
  34. 34.Which is closest to 202 + 903 + 803? (a) 2100 (b) 2000 (c) 1800 (d) 1900
  35. 35.Which is closest to 697 + 305 + 896? (a) 1800 (b) 1900 (c) 2100 (d) 2000
  36. 36.Which is closest to 200 × 79? (Round each number first.) (a) 1600 (b) 32000 (c) 16000 (d) 160000
  37. 37.Which is closest to 1998 ÷ 41? (a) 500 (b) 25 (c) 100 (d) 50
  38. 38.Which is closest to 905 + 597 + 803? (a) 2300 (b) 2500 (c) 2200 (d) 2400
  39. 39.Which is closest to 301 + 801 + 897? (a) 1900 (b) 2000 (c) 2200 (d) 2100
  40. 40.Round 54.51 to one decimal place. =

Answer key

  1. 98300
  2. 22.6
  3. 500
  4. 18000
  5. 30
  6. 89.1
  7. 20
  8. 600
  9. 48000
  10. 1800
  11. 32000
  12. 90
  13. 25.3
  14. 60
  15. 15000
  16. 6700
  17. 1700
  18. 1100
  19. 40
  20. 65000
  21. 1400
  22. 18000
  23. 45000
  24. 29.5
  25. 49.7
  26. 30
  27. 2200
  28. 14000
  29. 90
  30. 60
  31. 60
  32. 89.4
  33. 50
  34. 1900
  35. 1900
  36. 16000
  37. 50
  38. 2300
  39. 2000
  40. 54.5

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