← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 567 · 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 52.59 to one decimal place. =
  2. 2.Which is closest to 496 × 89? (Round each number first.) (a) 450000 (b) 4500 (c) 90000 (d) 45000
  3. 3.Round 43013 to the nearest thousand.
  4. 4.Round 10.09 to one decimal place. =
  5. 5.Which is closest to 908 ÷ 31? (a) 300 (b) 15 (c) 60 (d) 30
  6. 6.Round 33.71 to one decimal place. =
  7. 7.Which is closest to 98 + 802 + 595? (a) 1600 (b) 1700 (c) 1500 (d) 1400
  8. 8.Round 92949 to the nearest hundred.
  9. 9.Which is closest to 1000 ÷ 49? (a) 200 (b) 10 (c) 20 (d) 40
  10. 10.Which is closest to 4500 ÷ 49? (a) 900 (b) 45 (c) 180 (d) 90
  11. 11.Which is closest to 1201 ÷ 41? (a) 60 (b) 15 (c) 300 (d) 30
  12. 12.Which is closest to 802 + 605 + 899? (a) 2400 (b) 2200 (c) 2500 (d) 2300
  13. 13.Which is closest to 405 + 602 + 895? (a) 1900 (b) 1800 (c) 2000 (d) 2100
  14. 14.Which is closest to 697 × 70? (Round each number first.) (a) 4900 (b) 49000 (c) 98000 (d) 490000
  15. 15.Which is closest to 402 × 88? (Round each number first.) (a) 72000 (b) 360000 (c) 3600 (d) 36000
  16. 16.Round 35.63 to one decimal place. =
  17. 17.Round 69861 to the nearest hundred.
  18. 18.Round 58299 to the nearest thousand.
  19. 19.Which is closest to 203 × 32? (Round each number first.) (a) 12000 (b) 600 (c) 60000 (d) 6000
  20. 20.Round 76.86 to one decimal place. =
  21. 21.Round 41.13 to one decimal place. =
  22. 22.Which is closest to 201 × 41? (Round each number first.) (a) 80000 (b) 16000 (c) 800 (d) 8000
  23. 23.Which is closest to 409 ÷ 21? (a) 20 (b) 40 (c) 200 (d) 10
  24. 24.Which is closest to 496 × 50? (Round each number first.) (a) 2500 (b) 50000 (c) 250000 (d) 25000
  25. 25.Round 51.53 to one decimal place. =
  26. 26.Which is closest to 2501 ÷ 49? (a) 25 (b) 100 (c) 50 (d) 500
  27. 27.Which is closest to 902 + 897 + 804? (a) 2500 (b) 2600 (c) 2700 (d) 2800
  28. 28.Which is closest to 697 × 82? (Round each number first.) (a) 56000 (b) 560000 (c) 5600 (d) 112000
  29. 29.Round 27363 to the nearest thousand.
  30. 30.Which is closest to 297 + 97 + 198? (a) 500 (b) 600 (c) 800 (d) 700
  31. 31.Which is closest to 703 × 92? (Round each number first.) (a) 630000 (b) 6300 (c) 63000 (d) 126000
  32. 32.Round 24944 to the nearest thousand.
  33. 33.Which is closest to 600 + 402 + 197? (a) 1200 (b) 1300 (c) 1100 (d) 1400
  34. 34.Which is closest to 105 + 795 + 97? (a) 1100 (b) 1000 (c) 900 (d) 1200
  35. 35.Which is closest to 801 × 69? (Round each number first.) (a) 112000 (b) 56000 (c) 560000 (d) 5600
  36. 36.Which is closest to 602 + 196 + 101? (a) 900 (b) 1100 (c) 800 (d) 1000
  37. 37.Which is closest to 895 + 502 + 296? (a) 1600 (b) 1800 (c) 1900 (d) 1700
  38. 38.Round 93.56 to one decimal place. =
  39. 39.Round 91216 to the nearest hundred.
  40. 40.Which is closest to 98 + 105 + 96? (a) 500 (b) 400 (c) 300 (d) 200

Answer key

  1. 52.6
  2. 45000
  3. 43000
  4. 10.1
  5. 30
  6. 33.7
  7. 1500
  8. 92900
  9. 20
  10. 90
  11. 30
  12. 2300
  13. 1900
  14. 49000
  15. 36000
  16. 35.6
  17. 69900
  18. 58000
  19. 6000
  20. 76.9
  21. 41.1
  22. 8000
  23. 20
  24. 25000
  25. 51.5
  26. 50
  27. 2600
  28. 56000
  29. 27000
  30. 600
  31. 63000
  32. 25000
  33. 1200
  34. 1000
  35. 56000
  36. 900
  37. 1700
  38. 93.6
  39. 91200
  40. 300

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