← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 363 · 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 603 + 296 + 296? (a) 1100 (b) 1300 (c) 1400 (d) 1200
  2. 2.Which is closest to 501 × 79? (Round each number first.) (a) 4000 (b) 80000 (c) 400000 (d) 40000
  3. 3.Round 72.91 to one decimal place. =
  4. 4.Which is closest to 897 × 31? (Round each number first.) (a) 2700 (b) 54000 (c) 270000 (d) 27000
  5. 5.Which is closest to 201 × 89? (Round each number first.) (a) 36000 (b) 180000 (c) 1800 (d) 18000
  6. 6.Round 21.61 to one decimal place. =
  7. 7.Which is closest to 98 + 105 + 98? (a) 500 (b) 300 (c) 400 (d) 200
  8. 8.Which is closest to 298 × 42? (Round each number first.) (a) 12000 (b) 120000 (c) 24000 (d) 1200
  9. 9.Which is closest to 591 ÷ 19? (a) 30 (b) 60 (c) 15 (d) 300
  10. 10.Round 99849 to the nearest thousand.
  11. 11.Which is closest to 201 × 58? (Round each number first.) (a) 120000 (b) 1200 (c) 12000 (d) 24000
  12. 12.Round 15819 to the nearest ten.
  13. 13.Round 44.09 to one decimal place. =
  14. 14.Which is closest to 893 ÷ 31? (a) 300 (b) 60 (c) 30 (d) 15
  15. 15.Which is closest to 602 × 40? (Round each number first.) (a) 240000 (b) 2400 (c) 48000 (d) 24000
  16. 16.Which is closest to 503 × 72? (Round each number first.) (a) 3500 (b) 350000 (c) 70000 (d) 35000
  17. 17.Which is closest to 902 × 69? (Round each number first.) (a) 6300 (b) 63000 (c) 630000 (d) 126000
  18. 18.Which is closest to 3496 ÷ 51? (a) 70 (b) 140 (c) 35 (d) 700
  19. 19.Round 37290 to the nearest hundred.
  20. 20.Which is closest to 899 + 705 + 202? (a) 1900 (b) 1700 (c) 2000 (d) 1800
  21. 21.Which is closest to 104 + 196 + 297? (a) 800 (b) 500 (c) 600 (d) 700
  22. 22.Which is closest to 1193 ÷ 19? (a) 120 (b) 30 (c) 600 (d) 60
  23. 23.Round 44.39 to one decimal place. =
  24. 24.Which is closest to 198 × 22? (Round each number first.) (a) 40000 (b) 8000 (c) 4000 (d) 400
  25. 25.Which is closest to 302 × 32? (Round each number first.) (a) 9000 (b) 18000 (c) 90000 (d) 900
  26. 26.Which is closest to 203 × 40? (Round each number first.) (a) 8000 (b) 800 (c) 16000 (d) 80000
  27. 27.Which is closest to 605 + 195 + 300? (a) 1000 (b) 1200 (c) 1100 (d) 1300
  28. 28.Which is closest to 1208 ÷ 29? (a) 400 (b) 80 (c) 20 (d) 40
  29. 29.Which is closest to 1594 ÷ 19? (a) 40 (b) 80 (c) 800 (d) 160
  30. 30.Which is closest to 197 × 90? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
  31. 31.Round 33.48 to one decimal place. =
  32. 32.Round 67.67 to one decimal place. =
  33. 33.Round 64577 to the nearest thousand.
  34. 34.Round 34958 to the nearest thousand.
  35. 35.Which is closest to 799 + 96 + 797? (a) 1700 (b) 1900 (c) 1800 (d) 1600
  36. 36.Round 71381 to the nearest hundred.
  37. 37.Round 37.81 to one decimal place. =
  38. 38.Round 8408 to the nearest hundred.
  39. 39.Which is closest to 2493 ÷ 49? (a) 500 (b) 100 (c) 25 (d) 50
  40. 40.Which is closest to 1596 ÷ 19? (a) 80 (b) 40 (c) 800 (d) 160

Answer key

  1. 1200
  2. 40000
  3. 72.9
  4. 27000
  5. 18000
  6. 21.6
  7. 300
  8. 12000
  9. 30
  10. 100000
  11. 12000
  12. 15820
  13. 44.1
  14. 30
  15. 24000
  16. 35000
  17. 63000
  18. 70
  19. 37300
  20. 1800
  21. 600
  22. 60
  23. 44.4
  24. 4000
  25. 9000
  26. 8000
  27. 1100
  28. 40
  29. 80
  30. 18000
  31. 33.5
  32. 67.7
  33. 65000
  34. 35000
  35. 1700
  36. 71400
  37. 37.8
  38. 8400
  39. 50
  40. 80

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