← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 23 · 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 796 × 18? (Round each number first.) (a) 32000 (b) 16000 (c) 1600 (d) 160000
  2. 2.Round 93.06 to one decimal place. =
  3. 3.Round 87519 to the nearest thousand.
  4. 4.Which is closest to 805 ÷ 19? (a) 400 (b) 20 (c) 80 (d) 40
  5. 5.Which is closest to 2696 ÷ 31? (a) 180 (b) 900 (c) 90 (d) 45
  6. 6.Which is closest to 298 × 28? (Round each number first.) (a) 90000 (b) 18000 (c) 900 (d) 9000
  7. 7.Which is closest to 1594 ÷ 19? (a) 160 (b) 800 (c) 40 (d) 80
  8. 8.Which is closest to 204 + 804 + 305? (a) 1300 (b) 1200 (c) 1400 (d) 1500
  9. 9.Round 74.94 to one decimal place. =
  10. 10.Which is closest to 200 + 299 + 695? (a) 1400 (b) 1100 (c) 1200 (d) 1300
  11. 11.Round 82.13 to one decimal place. =
  12. 12.Round 37.93 to one decimal place. =
  13. 13.Round 71.63 to one decimal place. =
  14. 14.Round 14162 to the nearest ten.
  15. 15.Round 57864 to the nearest thousand.
  16. 16.Round 27849 to the nearest thousand.
  17. 17.Round 49904 to the nearest thousand.
  18. 18.Which is closest to 1499 ÷ 49? (a) 300 (b) 60 (c) 15 (d) 30
  19. 19.Round 46.06 to one decimal place. =
  20. 20.Which is closest to 1200 ÷ 21? (a) 30 (b) 600 (c) 60 (d) 120
  21. 21.Which is closest to 900 × 52? (Round each number first.) (a) 450000 (b) 4500 (c) 90000 (d) 45000
  22. 22.Which is closest to 1507 ÷ 51? (a) 30 (b) 15 (c) 60 (d) 300
  23. 23.Which is closest to 600 × 38? (Round each number first.) (a) 48000 (b) 24000 (c) 2400 (d) 240000
  24. 24.Which is closest to 2995 ÷ 49? (a) 120 (b) 600 (c) 30 (d) 60
  25. 25.Round 97097 to the nearest ten.
  26. 26.Which is closest to 701 + 898 + 905? (a) 2400 (b) 2600 (c) 2500 (d) 2700
  27. 27.Which is closest to 402 + 297 + 905? (a) 1800 (b) 1500 (c) 1700 (d) 1600
  28. 28.Which is closest to 196 × 80? (Round each number first.) (a) 16000 (b) 32000 (c) 1600 (d) 160000
  29. 29.Which is closest to 596 × 29? (Round each number first.) (a) 180000 (b) 1800 (c) 18000 (d) 36000
  30. 30.Round 4768 to the nearest thousand.
  31. 31.Which is closest to 797 × 21? (Round each number first.) (a) 16000 (b) 32000 (c) 160000 (d) 1600
  32. 32.Which is closest to 2394 ÷ 41? (a) 60 (b) 600 (c) 30 (d) 120
  33. 33.Which is closest to 3597 ÷ 39? (a) 45 (b) 180 (c) 900 (d) 90
  34. 34.Round 58566 to the nearest hundred.
  35. 35.Which is closest to 1598 ÷ 39? (a) 80 (b) 40 (c) 20 (d) 400
  36. 36.Round 69083 to the nearest hundred.
  37. 37.Which is closest to 299 + 99 + 96? (a) 600 (b) 700 (c) 400 (d) 500
  38. 38.Round 57.31 to one decimal place. =
  39. 39.Round 41.79 to one decimal place. =
  40. 40.Round 18157 to the nearest ten.

Answer key

  1. 16000
  2. 93.1
  3. 88000
  4. 40
  5. 90
  6. 9000
  7. 80
  8. 1300
  9. 74.9
  10. 1200
  11. 82.1
  12. 37.9
  13. 71.6
  14. 14160
  15. 58000
  16. 28000
  17. 50000
  18. 30
  19. 46.1
  20. 60
  21. 45000
  22. 30
  23. 24000
  24. 60
  25. 97100
  26. 2500
  27. 1600
  28. 16000
  29. 18000
  30. 5000
  31. 16000
  32. 60
  33. 90
  34. 58600
  35. 40
  36. 69100
  37. 500
  38. 57.3
  39. 41.8
  40. 18160

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