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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 725 · 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 19.28 to one decimal place. =
  2. 2.Which is closest to 596 + 399 + 196? (a) 1400 (b) 1200 (c) 1100 (d) 1300
  3. 3.Which is closest to 696 × 28? (Round each number first.) (a) 21000 (b) 210000 (c) 42000 (d) 2100
  4. 4.Round 86684 to the nearest hundred.
  5. 5.Which is closest to 596 × 69? (Round each number first.) (a) 84000 (b) 420000 (c) 4200 (d) 42000
  6. 6.Which is closest to 1801 ÷ 29? (a) 30 (b) 60 (c) 120 (d) 600
  7. 7.Round 98956 to the nearest ten.
  8. 8.Which is closest to 1500 ÷ 29? (a) 100 (b) 50 (c) 25 (d) 500
  9. 9.Round 13501 to the nearest ten.
  10. 10.Round 56.91 to one decimal place. =
  11. 11.Which is closest to 991 ÷ 19? (a) 50 (b) 100 (c) 25 (d) 500
  12. 12.Round 83.43 to one decimal place. =
  13. 13.Round 67.17 to one decimal place. =
  14. 14.Which is closest to 696 × 89? (Round each number first.) (a) 63000 (b) 630000 (c) 6300 (d) 126000
  15. 15.Round 40444 to the nearest hundred.
  16. 16.Which is closest to 2009 ÷ 49? (a) 400 (b) 40 (c) 80 (d) 20
  17. 17.Which is closest to 797 + 303 + 305? (a) 1300 (b) 1600 (c) 1400 (d) 1500
  18. 18.Which is closest to 2395 ÷ 41? (a) 120 (b) 60 (c) 30 (d) 600
  19. 19.Round 18878 to the nearest thousand.
  20. 20.Round 57389 to the nearest hundred.
  21. 21.Which is closest to 1592 ÷ 39? (a) 80 (b) 400 (c) 20 (d) 40
  22. 22.Round 74673 to the nearest thousand.
  23. 23.Round 55.08 to one decimal place. =
  24. 24.Which is closest to 1195 ÷ 41? (a) 60 (b) 300 (c) 30 (d) 15
  25. 25.Which is closest to 1209 ÷ 41? (a) 30 (b) 60 (c) 15 (d) 300
  26. 26.Round 14.86 to one decimal place. =
  27. 27.Which is closest to 704 + 404 + 903? (a) 2100 (b) 1900 (c) 2000 (d) 2200
  28. 28.Which is closest to 97 + 805 + 196? (a) 1300 (b) 1000 (c) 1100 (d) 1200
  29. 29.Which is closest to 3606 ÷ 41? (a) 45 (b) 90 (c) 900 (d) 180
  30. 30.Round 76336 to the nearest ten.
  31. 31.Which is closest to 698 × 61? (Round each number first.) (a) 4200 (b) 420000 (c) 42000 (d) 84000
  32. 32.Which is closest to 793 ÷ 21? (a) 80 (b) 20 (c) 400 (d) 40
  33. 33.Which is closest to 396 × 69? (Round each number first.) (a) 56000 (b) 280000 (c) 28000 (d) 2800
  34. 34.Which is closest to 1598 ÷ 41? (a) 40 (b) 80 (c) 20 (d) 400
  35. 35.Round 61.16 to one decimal place. =
  36. 36.Which is closest to 904 + 697 + 99? (a) 1800 (b) 1600 (c) 1700 (d) 1900
  37. 37.Which is closest to 2998 ÷ 51? (a) 30 (b) 600 (c) 120 (d) 60
  38. 38.Which is closest to 703 + 898 + 704? (a) 2400 (b) 2300 (c) 2500 (d) 2200
  39. 39.Which is closest to 203 + 904 + 697? (a) 1900 (b) 2000 (c) 1800 (d) 1700
  40. 40.Round 72.86 to one decimal place. =

Answer key

  1. 19.3
  2. 1200
  3. 21000
  4. 86700
  5. 42000
  6. 60
  7. 98960
  8. 50
  9. 13500
  10. 56.9
  11. 50
  12. 83.4
  13. 67.2
  14. 63000
  15. 40400
  16. 40
  17. 1400
  18. 60
  19. 19000
  20. 57400
  21. 40
  22. 75000
  23. 55.1
  24. 30
  25. 30
  26. 14.9
  27. 2000
  28. 1100
  29. 90
  30. 76340
  31. 42000
  32. 40
  33. 28000
  34. 40
  35. 61.2
  36. 1700
  37. 60
  38. 2300
  39. 1800
  40. 72.9

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