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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 552 · 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 896 + 98 + 496? (a) 1400 (b) 1500 (c) 1700 (d) 1600
  2. 2.Which is closest to 698 × 79? (Round each number first.) (a) 560000 (b) 56000 (c) 112000 (d) 5600
  3. 3.Round 77031 to the nearest thousand.
  4. 4.Which is closest to 798 + 196 + 105? (a) 1100 (b) 1000 (c) 1300 (d) 1200
  5. 5.Which is closest to 1492 ÷ 29? (a) 50 (b) 100 (c) 500 (d) 25
  6. 6.Round 40245 to the nearest hundred.
  7. 7.Which is closest to 95 + 97 + 196? (a) 300 (b) 500 (c) 400 (d) 600
  8. 8.Which is closest to 803 + 697 + 603? (a) 2200 (b) 2300 (c) 2100 (d) 2000
  9. 9.Round 64427 to the nearest ten.
  10. 10.Round 77.79 to one decimal place. =
  11. 11.Which is closest to 604 + 901 + 697? (a) 2100 (b) 2400 (c) 2200 (d) 2300
  12. 12.Round 99.07 to one decimal place. =
  13. 13.Round 27.27 to one decimal place. =
  14. 14.Which is closest to 104 + 395 + 803? (a) 1500 (b) 1400 (c) 1300 (d) 1200
  15. 15.Which is closest to 601 ÷ 21? (a) 30 (b) 300 (c) 15 (d) 60
  16. 16.Round 46.37 to one decimal place. =
  17. 17.Which is closest to 404 + 395 + 498? (a) 1400 (b) 1300 (c) 1500 (d) 1200
  18. 18.Which is closest to 799 + 104 + 804? (a) 1600 (b) 1700 (c) 1800 (d) 1900
  19. 19.Round 80659 to the nearest hundred.
  20. 20.Which is closest to 498 + 100 + 905? (a) 1400 (b) 1700 (c) 1600 (d) 1500
  21. 21.Which is closest to 402 + 295 + 395? (a) 1200 (b) 1300 (c) 1000 (d) 1100
  22. 22.Round 80096 to the nearest thousand.
  23. 23.Which is closest to 97 + 305 + 502? (a) 1100 (b) 800 (c) 1000 (d) 900
  24. 24.Which is closest to 1193 ÷ 41? (a) 300 (b) 60 (c) 15 (d) 30
  25. 25.Which is closest to 198 + 896 + 98? (a) 1400 (b) 1100 (c) 1200 (d) 1300
  26. 26.Round 39.73 to one decimal place. =
  27. 27.Which is closest to 604 × 30? (Round each number first.) (a) 36000 (b) 18000 (c) 1800 (d) 180000
  28. 28.Which is closest to 200 + 404 + 103? (a) 600 (b) 700 (c) 900 (d) 800
  29. 29.Which is closest to 1196 ÷ 19? (a) 600 (b) 30 (c) 120 (d) 60
  30. 30.Round 90.33 to one decimal place. =
  31. 31.Which is closest to 96 + 697 + 402? (a) 1100 (b) 1300 (c) 1200 (d) 1400
  32. 32.Round 49398 to the nearest thousand.
  33. 33.Which is closest to 598 × 42? (Round each number first.) (a) 2400 (b) 48000 (c) 240000 (d) 24000
  34. 34.Which is closest to 897 ÷ 31? (a) 15 (b) 60 (c) 30 (d) 300
  35. 35.Round 57.87 to one decimal place. =
  36. 36.Round 42.31 to one decimal place. =
  37. 37.Which is closest to 597 ÷ 19? (a) 15 (b) 30 (c) 300 (d) 60
  38. 38.Which is closest to 605 + 297 + 798? (a) 1600 (b) 1800 (c) 1900 (d) 1700
  39. 39.Which is closest to 704 × 59? (Round each number first.) (a) 4200 (b) 420000 (c) 42000 (d) 84000
  40. 40.Which is closest to 701 + 104 + 395? (a) 1100 (b) 1400 (c) 1200 (d) 1300

Answer key

  1. 1500
  2. 56000
  3. 77000
  4. 1100
  5. 50
  6. 40200
  7. 400
  8. 2100
  9. 64430
  10. 77.8
  11. 2200
  12. 99.1
  13. 27.3
  14. 1300
  15. 30
  16. 46.4
  17. 1300
  18. 1700
  19. 80700
  20. 1500
  21. 1100
  22. 80000
  23. 900
  24. 30
  25. 1200
  26. 39.7
  27. 18000
  28. 700
  29. 60
  30. 90.3
  31. 1200
  32. 49000
  33. 24000
  34. 30
  35. 57.9
  36. 42.3
  37. 30
  38. 1700
  39. 42000
  40. 1200

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