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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 592 · 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 1808 ÷ 19? (a) 180 (b) 45 (c) 900 (d) 90
  2. 2.Which is closest to 2993 ÷ 49? (a) 600 (b) 120 (c) 30 (d) 60
  3. 3.Which is closest to 2001 ÷ 41? (a) 500 (b) 25 (c) 50 (d) 100
  4. 4.Round 79.83 to one decimal place. =
  5. 5.Which is closest to 305 + 895 + 903? (a) 2000 (b) 2300 (c) 2100 (d) 2200
  6. 6.Which is closest to 200 + 198 + 896? (a) 1200 (b) 1400 (c) 1500 (d) 1300
  7. 7.Which is closest to 303 × 30? (Round each number first.) (a) 90000 (b) 18000 (c) 900 (d) 9000
  8. 8.Which is closest to 1202 ÷ 29? (a) 40 (b) 20 (c) 80 (d) 400
  9. 9.Which is closest to 896 + 601 + 204? (a) 1900 (b) 1800 (c) 1600 (d) 1700
  10. 10.Which is closest to 1809 ÷ 29? (a) 120 (b) 30 (c) 60 (d) 600
  11. 11.Which is closest to 296 + 504 + 203? (a) 900 (b) 1200 (c) 1000 (d) 1100
  12. 12.Which is closest to 499 × 22? (Round each number first.) (a) 20000 (b) 10000 (c) 100000 (d) 1000
  13. 13.Round 24250 to the nearest thousand.
  14. 14.Which is closest to 404 × 69? (Round each number first.) (a) 2800 (b) 280000 (c) 56000 (d) 28000
  15. 15.Which is closest to 103 + 497 + 195? (a) 700 (b) 900 (c) 800 (d) 1000
  16. 16.Round 91037 to the nearest hundred.
  17. 17.Round 95.22 to one decimal place. =
  18. 18.Round 14976 to the nearest ten.
  19. 19.Which is closest to 594 ÷ 19? (a) 15 (b) 30 (c) 60 (d) 300
  20. 20.Which is closest to 904 ÷ 29? (a) 60 (b) 30 (c) 15 (d) 300
  21. 21.Which is closest to 700 × 71? (Round each number first.) (a) 4900 (b) 49000 (c) 490000 (d) 98000
  22. 22.Round 9201 to the nearest hundred.
  23. 23.Which is closest to 399 × 19? (Round each number first.) (a) 800 (b) 16000 (c) 80000 (d) 8000
  24. 24.Round 17187 to the nearest ten.
  25. 25.Round 23544 to the nearest ten.
  26. 26.Which is closest to 698 + 802 + 105? (a) 1700 (b) 1500 (c) 1800 (d) 1600
  27. 27.Which is closest to 4509 ÷ 51? (a) 180 (b) 900 (c) 45 (d) 90
  28. 28.Which is closest to 499 × 59? (Round each number first.) (a) 300000 (b) 3000 (c) 30000 (d) 60000
  29. 29.Round 60434 to the nearest hundred.
  30. 30.Which is closest to 3206 ÷ 39? (a) 160 (b) 800 (c) 80 (d) 40
  31. 31.Round 17.61 to one decimal place. =
  32. 32.Which is closest to 993 ÷ 19? (a) 500 (b) 100 (c) 25 (d) 50
  33. 33.Which is closest to 300 × 52? (Round each number first.) (a) 1500 (b) 30000 (c) 15000 (d) 150000
  34. 34.Which is closest to 399 × 30? (Round each number first.) (a) 12000 (b) 24000 (c) 1200 (d) 120000
  35. 35.Round 11978 to the nearest ten.
  36. 36.Round 48.07 to one decimal place. =
  37. 37.Which is closest to 201 + 899 + 98? (a) 1100 (b) 1200 (c) 1300 (d) 1400
  38. 38.Which is closest to 104 + 797 + 496? (a) 1400 (b) 1500 (c) 1300 (d) 1600
  39. 39.Which is closest to 695 + 498 + 299? (a) 1600 (b) 1400 (c) 1700 (d) 1500
  40. 40.Which is closest to 804 × 89? (Round each number first.) (a) 7200 (b) 720000 (c) 144000 (d) 72000

Answer key

  1. 90
  2. 60
  3. 50
  4. 79.8
  5. 2100
  6. 1300
  7. 9000
  8. 40
  9. 1700
  10. 60
  11. 1000
  12. 10000
  13. 24000
  14. 28000
  15. 800
  16. 91000
  17. 95.2
  18. 14980
  19. 30
  20. 30
  21. 49000
  22. 9200
  23. 8000
  24. 17190
  25. 23540
  26. 1600
  27. 90
  28. 30000
  29. 60400
  30. 80
  31. 17.6
  32. 50
  33. 15000
  34. 12000
  35. 11980
  36. 48.1
  37. 1200
  38. 1400
  39. 1500
  40. 72000

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