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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 104 · 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.Round 3067 to the nearest thousand.
  2. 2.Round 69.44 to one decimal place. =
  3. 3.Which is closest to 696 + 895 + 605? (a) 2200 (b) 2300 (c) 2100 (d) 2400
  4. 4.Which is closest to 397 ÷ 21? (a) 10 (b) 40 (c) 20 (d) 200
  5. 5.Which is closest to 704 + 195 + 505? (a) 1600 (b) 1400 (c) 1500 (d) 1300
  6. 6.Which is closest to 903 + 803 + 201? (a) 1900 (b) 2000 (c) 2100 (d) 1800
  7. 7.Round 69589 to the nearest thousand.
  8. 8.Which is closest to 201 × 88? (Round each number first.) (a) 1800 (b) 18000 (c) 180000 (d) 36000
  9. 9.Which is closest to 901 + 797 + 96? (a) 1800 (b) 1900 (c) 1700 (d) 2000
  10. 10.Which is closest to 802 × 19? (Round each number first.) (a) 16000 (b) 160000 (c) 32000 (d) 1600
  11. 11.Which is closest to 3006 ÷ 49? (a) 120 (b) 30 (c) 60 (d) 600
  12. 12.Round 10904 to the nearest thousand.
  13. 13.Which is closest to 395 ÷ 19? (a) 40 (b) 20 (c) 200 (d) 10
  14. 14.Which is closest to 397 + 896 + 105? (a) 1600 (b) 1500 (c) 1400 (d) 1300
  15. 15.Which is closest to 803 ÷ 19? (a) 80 (b) 40 (c) 400 (d) 20
  16. 16.Round 27.32 to one decimal place. =
  17. 17.Which is closest to 903 + 595 + 200? (a) 1600 (b) 1800 (c) 1700 (d) 1900
  18. 18.Round 22493 to the nearest hundred.
  19. 19.Which is closest to 900 × 59? (Round each number first.) (a) 5400 (b) 540000 (c) 54000 (d) 108000
  20. 20.Round 57.53 to one decimal place. =
  21. 21.Which is closest to 806 ÷ 21? (a) 40 (b) 80 (c) 20 (d) 400
  22. 22.Round 17.53 to one decimal place. =
  23. 23.Which is closest to 397 × 70? (Round each number first.) (a) 56000 (b) 2800 (c) 280000 (d) 28000
  24. 24.Round 38.42 to one decimal place. =
  25. 25.Round 50503 to the nearest ten.
  26. 26.Which is closest to 1206 ÷ 39? (a) 15 (b) 60 (c) 30 (d) 300
  27. 27.Round 87.91 to one decimal place. =
  28. 28.Round 55.33 to one decimal place. =
  29. 29.Which is closest to 696 × 19? (Round each number first.) (a) 14000 (b) 140000 (c) 28000 (d) 1400
  30. 30.Round 69.26 to one decimal place. =
  31. 31.Which is closest to 1193 ÷ 29? (a) 400 (b) 80 (c) 20 (d) 40
  32. 32.Which is closest to 398 × 72? (Round each number first.) (a) 2800 (b) 28000 (c) 280000 (d) 56000
  33. 33.Round 91.66 to one decimal place. =
  34. 34.Round 27542 to the nearest thousand.
  35. 35.Round 40161 to the nearest thousand.
  36. 36.Which is closest to 197 × 39? (Round each number first.) (a) 16000 (b) 80000 (c) 800 (d) 8000
  37. 37.Which is closest to 2493 ÷ 51? (a) 500 (b) 50 (c) 25 (d) 100
  38. 38.Round 43174 to the nearest ten.
  39. 39.Round 95.89 to one decimal place. =
  40. 40.Round 35.12 to one decimal place. =

Answer key

  1. 3000
  2. 69.4
  3. 2200
  4. 20
  5. 1400
  6. 1900
  7. 70000
  8. 18000
  9. 1800
  10. 16000
  11. 60
  12. 11000
  13. 20
  14. 1400
  15. 40
  16. 27.3
  17. 1700
  18. 22500
  19. 54000
  20. 57.5
  21. 40
  22. 17.5
  23. 28000
  24. 38.4
  25. 50500
  26. 30
  27. 87.9
  28. 55.3
  29. 14000
  30. 69.3
  31. 40
  32. 28000
  33. 91.7
  34. 28000
  35. 40000
  36. 8000
  37. 50
  38. 43170
  39. 95.9
  40. 35.1

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