← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 92 · 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 596 × 60? (Round each number first.) (a) 72000 (b) 3600 (c) 360000 (d) 36000
  2. 2.Round 10.33 to one decimal place. =
  3. 3.Which is closest to 892 ÷ 29? (a) 300 (b) 30 (c) 60 (d) 15
  4. 4.Which is closest to 203 + 102 + 302? (a) 800 (b) 600 (c) 500 (d) 700
  5. 5.Round 57.93 to one decimal place. =
  6. 6.Which is closest to 405 + 895 + 895? (a) 2300 (b) 2100 (c) 2200 (d) 2400
  7. 7.Which is closest to 900 + 505 + 899? (a) 2300 (b) 2500 (c) 2200 (d) 2400
  8. 8.Which is closest to 599 × 79? (Round each number first.) (a) 48000 (b) 4800 (c) 480000 (d) 96000
  9. 9.Which is closest to 396 + 603 + 897? (a) 2100 (b) 2000 (c) 1900 (d) 1800
  10. 10.Which is closest to 501 × 31? (Round each number first.) (a) 15000 (b) 150000 (c) 30000 (d) 1500
  11. 11.Round 99654 to the nearest hundred.
  12. 12.Which is closest to 902 ÷ 29? (a) 300 (b) 30 (c) 60 (d) 15
  13. 13.Which is closest to 800 + 296 + 796? (a) 1800 (b) 1900 (c) 2100 (d) 2000
  14. 14.Which is closest to 105 + 105 + 198? (a) 500 (b) 600 (c) 400 (d) 300
  15. 15.Which is closest to 404 + 799 + 501? (a) 1600 (b) 1700 (c) 1900 (d) 1800
  16. 16.Which is closest to 600 + 304 + 102? (a) 1100 (b) 900 (c) 1000 (d) 1200
  17. 17.Which is closest to 198 × 31? (Round each number first.) (a) 60000 (b) 6000 (c) 12000 (d) 600
  18. 18.Which is closest to 901 + 297 + 95? (a) 1500 (b) 1300 (c) 1200 (d) 1400
  19. 19.Which is closest to 602 × 68? (Round each number first.) (a) 420000 (b) 42000 (c) 4200 (d) 84000
  20. 20.Round 24.69 to one decimal place. =
  21. 21.Which is closest to 399 + 800 + 604? (a) 1700 (b) 2000 (c) 1900 (d) 1800
  22. 22.Round 12.82 to one decimal place. =
  23. 23.Which is closest to 502 × 20? (Round each number first.) (a) 1000 (b) 100000 (c) 20000 (d) 10000
  24. 24.Round 1763 to the nearest ten.
  25. 25.Which is closest to 1206 ÷ 21? (a) 30 (b) 120 (c) 600 (d) 60
  26. 26.Which is closest to 398 × 40? (Round each number first.) (a) 16000 (b) 32000 (c) 1600 (d) 160000
  27. 27.Which is closest to 398 + 901 + 96? (a) 1300 (b) 1400 (c) 1500 (d) 1600
  28. 28.Which is closest to 401 + 296 + 896? (a) 1700 (b) 1500 (c) 1800 (d) 1600
  29. 29.Round 54479 to the nearest hundred.
  30. 30.Round 25.49 to one decimal place. =
  31. 31.Round 96.54 to one decimal place. =
  32. 32.Which is closest to 1209 ÷ 21? (a) 30 (b) 600 (c) 60 (d) 120
  33. 33.Which is closest to 400 × 48? (Round each number first.) (a) 20000 (b) 40000 (c) 2000 (d) 200000
  34. 34.Round 77645 to the nearest hundred.
  35. 35.Which is closest to 298 + 604 + 398? (a) 1200 (b) 1400 (c) 1300 (d) 1500
  36. 36.Which is closest to 1801 ÷ 29? (a) 600 (b) 60 (c) 120 (d) 30
  37. 37.Round 79.21 to one decimal place. =
  38. 38.Round 54.63 to one decimal place. =
  39. 39.Which is closest to 605 + 203 + 496? (a) 1200 (b) 1500 (c) 1400 (d) 1300
  40. 40.Round 59693 to the nearest ten.

Answer key

  1. 36000
  2. 10.3
  3. 30
  4. 600
  5. 57.9
  6. 2200
  7. 2300
  8. 48000
  9. 1900
  10. 15000
  11. 99700
  12. 30
  13. 1900
  14. 400
  15. 1700
  16. 1000
  17. 6000
  18. 1300
  19. 42000
  20. 24.7
  21. 1800
  22. 12.8
  23. 10000
  24. 1760
  25. 60
  26. 16000
  27. 1400
  28. 1600
  29. 54500
  30. 25.5
  31. 96.5
  32. 60
  33. 20000
  34. 77600
  35. 1300
  36. 60
  37. 79.2
  38. 54.6
  39. 1300
  40. 59690

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