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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 880 · 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 97049 to the nearest thousand.
  2. 2.Round 52.72 to one decimal place. =
  3. 3.Which is closest to 697 × 79? (Round each number first.) (a) 112000 (b) 5600 (c) 56000 (d) 560000
  4. 4.Round 34.26 to one decimal place. =
  5. 5.Round 93724 to the nearest hundred.
  6. 6.Round 62.71 to one decimal place. =
  7. 7.Which is closest to 397 + 601 + 600? (a) 1500 (b) 1700 (c) 1800 (d) 1600
  8. 8.Which is closest to 605 + 703 + 202? (a) 1600 (b) 1700 (c) 1500 (d) 1400
  9. 9.Round 7837 to the nearest thousand.
  10. 10.Round 22196 to the nearest hundred.
  11. 11.Round 33.29 to one decimal place. =
  12. 12.Which is closest to 795 + 104 + 802? (a) 1800 (b) 1900 (c) 1700 (d) 1600
  13. 13.Which is closest to 502 × 38? (Round each number first.) (a) 200000 (b) 2000 (c) 20000 (d) 40000
  14. 14.Round 19479 to the nearest ten.
  15. 15.Which is closest to 598 + 401 + 801? (a) 1900 (b) 1700 (c) 1800 (d) 2000
  16. 16.Which is closest to 596 + 905 + 196? (a) 1700 (b) 1800 (c) 1900 (d) 1600
  17. 17.Which is closest to 196 × 59? (Round each number first.) (a) 24000 (b) 120000 (c) 12000 (d) 1200
  18. 18.Round 46869 to the nearest hundred.
  19. 19.Round 96.49 to one decimal place. =
  20. 20.Round 12707 to the nearest hundred.
  21. 21.Which is closest to 797 ÷ 39? (a) 40 (b) 200 (c) 20 (d) 10
  22. 22.Round 37.16 to one decimal place. =
  23. 23.Round 32.63 to one decimal place. =
  24. 24.Which is closest to 797 × 52? (Round each number first.) (a) 400000 (b) 4000 (c) 80000 (d) 40000
  25. 25.Which is closest to 1192 ÷ 41? (a) 300 (b) 60 (c) 15 (d) 30
  26. 26.Which is closest to 3003 ÷ 51? (a) 120 (b) 60 (c) 600 (d) 30
  27. 27.Round 12.11 to one decimal place. =
  28. 28.Which is closest to 500 + 901 + 503? (a) 2000 (b) 1900 (c) 2100 (d) 1800
  29. 29.Which is closest to 2694 ÷ 29? (a) 900 (b) 180 (c) 45 (d) 90
  30. 30.Round 74886 to the nearest thousand.
  31. 31.Which is closest to 1596 ÷ 19? (a) 80 (b) 40 (c) 800 (d) 160
  32. 32.Which is closest to 1802 ÷ 29? (a) 120 (b) 600 (c) 60 (d) 30
  33. 33.Round 76.56 to one decimal place. =
  34. 34.Which is closest to 3497 ÷ 51? (a) 35 (b) 700 (c) 70 (d) 140
  35. 35.Which is closest to 96 + 797 + 703? (a) 1700 (b) 1500 (c) 1800 (d) 1600
  36. 36.Which is closest to 499 + 103 + 605? (a) 1200 (b) 1100 (c) 1300 (d) 1400
  37. 37.Round 71.48 to one decimal place. =
  38. 38.Which is closest to 2005 ÷ 49? (a) 80 (b) 20 (c) 40 (d) 400
  39. 39.Which is closest to 2692 ÷ 31? (a) 180 (b) 900 (c) 45 (d) 90
  40. 40.Round 12.34 to one decimal place. =

Answer key

  1. 97000
  2. 52.7
  3. 56000
  4. 34.3
  5. 93700
  6. 62.7
  7. 1600
  8. 1500
  9. 8000
  10. 22200
  11. 33.3
  12. 1700
  13. 20000
  14. 19480
  15. 1800
  16. 1700
  17. 12000
  18. 46900
  19. 96.5
  20. 12700
  21. 20
  22. 37.2
  23. 32.6
  24. 40000
  25. 30
  26. 60
  27. 12.1
  28. 1900
  29. 90
  30. 75000
  31. 80
  32. 60
  33. 76.6
  34. 70
  35. 1600
  36. 1200
  37. 71.5
  38. 40
  39. 90
  40. 12.3

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