← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 979 · 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 1196 ÷ 29? (a) 20 (b) 40 (c) 80 (d) 400
  2. 2.Round 50.76 to one decimal place. =
  3. 3.Round 47.19 to one decimal place. =
  4. 4.Which is closest to 899 × 59? (Round each number first.) (a) 5400 (b) 108000 (c) 54000 (d) 540000
  5. 5.Which is closest to 298 × 28? (Round each number first.) (a) 9000 (b) 90000 (c) 18000 (d) 900
  6. 6.Which is closest to 1598 ÷ 21? (a) 800 (b) 160 (c) 40 (d) 80
  7. 7.Which is closest to 903 × 62? (Round each number first.) (a) 54000 (b) 540000 (c) 108000 (d) 5400
  8. 8.Which is closest to 498 × 52? (Round each number first.) (a) 250000 (b) 50000 (c) 25000 (d) 2500
  9. 9.Which is closest to 396 × 29? (Round each number first.) (a) 24000 (b) 12000 (c) 120000 (d) 1200
  10. 10.Which is closest to 700 + 205 + 399? (a) 1400 (b) 1500 (c) 1300 (d) 1200
  11. 11.Which is closest to 904 × 19? (Round each number first.) (a) 36000 (b) 180000 (c) 1800 (d) 18000
  12. 12.Which is closest to 999 ÷ 19? (a) 50 (b) 25 (c) 100 (d) 500
  13. 13.Round 19639 to the nearest thousand.
  14. 14.Which is closest to 1494 ÷ 49? (a) 300 (b) 60 (c) 15 (d) 30
  15. 15.Which is closest to 1793 ÷ 19? (a) 45 (b) 180 (c) 900 (d) 90
  16. 16.Round 2805 to the nearest hundred.
  17. 17.Round 45129 to the nearest thousand.
  18. 18.Round 63.54 to one decimal place. =
  19. 19.Which is closest to 395 + 400 + 802? (a) 1700 (b) 1800 (c) 1600 (d) 1500
  20. 20.Round 91361 to the nearest ten.
  21. 21.Round 65.67 to one decimal place. =
  22. 22.Round 15944 to the nearest thousand.
  23. 23.Round 76.89 to one decimal place. =
  24. 24.Which is closest to 596 × 22? (Round each number first.) (a) 120000 (b) 24000 (c) 12000 (d) 1200
  25. 25.Round 21.58 to one decimal place. =
  26. 26.Which is closest to 902 × 48? (Round each number first.) (a) 4500 (b) 45000 (c) 90000 (d) 450000
  27. 27.Which is closest to 3602 ÷ 41? (a) 45 (b) 180 (c) 90 (d) 900
  28. 28.Which is closest to 797 ÷ 21? (a) 20 (b) 80 (c) 40 (d) 400
  29. 29.Which is closest to 998 ÷ 19? (a) 500 (b) 25 (c) 100 (d) 50
  30. 30.Which is closest to 103 + 301 + 298? (a) 800 (b) 700 (c) 900 (d) 600
  31. 31.Which is closest to 4494 ÷ 51? (a) 900 (b) 180 (c) 90 (d) 45
  32. 32.Which is closest to 201 × 32? (Round each number first.) (a) 6000 (b) 600 (c) 60000 (d) 12000
  33. 33.Which is closest to 797 × 69? (Round each number first.) (a) 5600 (b) 56000 (c) 560000 (d) 112000
  34. 34.Which is closest to 2402 ÷ 31? (a) 800 (b) 40 (c) 160 (d) 80
  35. 35.Round 99956 to the nearest ten.
  36. 36.Which is closest to 195 + 295 + 896? (a) 1300 (b) 1500 (c) 1400 (d) 1600
  37. 37.Round 72799 to the nearest ten.
  38. 38.Which is closest to 1608 ÷ 19? (a) 160 (b) 40 (c) 800 (d) 80
  39. 39.Round 47.52 to one decimal place. =
  40. 40.Which is closest to 699 + 402 + 905? (a) 2000 (b) 2200 (c) 2100 (d) 1900

Answer key

  1. 40
  2. 50.8
  3. 47.2
  4. 54000
  5. 9000
  6. 80
  7. 54000
  8. 25000
  9. 12000
  10. 1300
  11. 18000
  12. 50
  13. 20000
  14. 30
  15. 90
  16. 2800
  17. 45000
  18. 63.5
  19. 1600
  20. 91360
  21. 65.7
  22. 16000
  23. 76.9
  24. 12000
  25. 21.6
  26. 45000
  27. 90
  28. 40
  29. 50
  30. 700
  31. 90
  32. 6000
  33. 56000
  34. 80
  35. 99960
  36. 1400
  37. 72800
  38. 80
  39. 47.5
  40. 2000

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