← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 732 · 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 40792 to the nearest hundred.
  2. 2.Round 35963 to the nearest ten.
  3. 3.Round 72.18 to one decimal place. =
  4. 4.Which is closest to 703 + 303 + 401? (a) 1500 (b) 1300 (c) 1600 (d) 1400
  5. 5.Round 25.62 to one decimal place. =
  6. 6.Which is closest to 296 × 19? (Round each number first.) (a) 60000 (b) 6000 (c) 600 (d) 12000
  7. 7.Round 10.26 to one decimal place. =
  8. 8.Which is closest to 96 + 304 + 96? (a) 600 (b) 400 (c) 700 (d) 500
  9. 9.Which is closest to 595 + 200 + 601? (a) 1600 (b) 1400 (c) 1500 (d) 1300
  10. 10.Which is closest to 602 × 18? (Round each number first.) (a) 12000 (b) 120000 (c) 24000 (d) 1200
  11. 11.Which is closest to 696 × 91? (Round each number first.) (a) 630000 (b) 126000 (c) 6300 (d) 63000
  12. 12.Round 40629 to the nearest thousand.
  13. 13.Which is closest to 2093 ÷ 29? (a) 35 (b) 700 (c) 140 (d) 70
  14. 14.Round 76.88 to one decimal place. =
  15. 15.Which is closest to 1802 ÷ 19? (a) 180 (b) 45 (c) 90 (d) 900
  16. 16.Round 71.36 to one decimal place. =
  17. 17.Round 52.71 to one decimal place. =
  18. 18.Which is closest to 903 + 803 + 598? (a) 2400 (b) 2300 (c) 2500 (d) 2200
  19. 19.Which is closest to 397 × 58? (Round each number first.) (a) 24000 (b) 48000 (c) 240000 (d) 2400
  20. 20.Which is closest to 899 × 70? (Round each number first.) (a) 6300 (b) 630000 (c) 126000 (d) 63000
  21. 21.Which is closest to 2793 ÷ 41? (a) 140 (b) 700 (c) 35 (d) 70
  22. 22.Which is closest to 304 × 79? (Round each number first.) (a) 48000 (b) 24000 (c) 240000 (d) 2400
  23. 23.Round 68.57 to one decimal place. =
  24. 24.Which is closest to 196 × 19? (Round each number first.) (a) 400 (b) 4000 (c) 8000 (d) 40000
  25. 25.Which is closest to 904 × 69? (Round each number first.) (a) 63000 (b) 126000 (c) 6300 (d) 630000
  26. 26.Round 21.22 to one decimal place. =
  27. 27.Which is closest to 398 × 42? (Round each number first.) (a) 32000 (b) 1600 (c) 160000 (d) 16000
  28. 28.Round 51.52 to one decimal place. =
  29. 29.Which is closest to 299 + 296 + 802? (a) 1500 (b) 1400 (c) 1600 (d) 1300
  30. 30.Which is closest to 1407 ÷ 19? (a) 140 (b) 700 (c) 70 (d) 35
  31. 31.Which is closest to 999 ÷ 21? (a) 500 (b) 25 (c) 100 (d) 50
  32. 32.Which is closest to 903 ÷ 29? (a) 60 (b) 300 (c) 15 (d) 30
  33. 33.Round 5743 to the nearest thousand.
  34. 34.Round 14.73 to one decimal place. =
  35. 35.Which is closest to 497 + 803 + 198? (a) 1500 (b) 1600 (c) 1400 (d) 1700
  36. 36.Which is closest to 2098 ÷ 31? (a) 700 (b) 35 (c) 70 (d) 140
  37. 37.Which is closest to 497 × 68? (Round each number first.) (a) 70000 (b) 350000 (c) 3500 (d) 35000
  38. 38.Which is closest to 503 × 70? (Round each number first.) (a) 350000 (b) 70000 (c) 35000 (d) 3500
  39. 39.Which is closest to 1597 ÷ 19? (a) 160 (b) 80 (c) 40 (d) 800
  40. 40.Which is closest to 697 + 195 + 100? (a) 900 (b) 1000 (c) 1200 (d) 1100

Answer key

  1. 40800
  2. 35960
  3. 72.2
  4. 1400
  5. 25.6
  6. 6000
  7. 10.3
  8. 500
  9. 1400
  10. 12000
  11. 63000
  12. 41000
  13. 70
  14. 76.9
  15. 90
  16. 71.4
  17. 52.7
  18. 2300
  19. 24000
  20. 63000
  21. 70
  22. 24000
  23. 68.6
  24. 4000
  25. 63000
  26. 21.2
  27. 16000
  28. 51.5
  29. 1400
  30. 70
  31. 50
  32. 30
  33. 6000
  34. 14.7
  35. 1500
  36. 70
  37. 35000
  38. 35000
  39. 80
  40. 1000

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