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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 909 · 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 75167 to the nearest thousand.
  2. 2.Round 20585 to the nearest thousand.
  3. 3.Which is closest to 2104 ÷ 29? (a) 35 (b) 70 (c) 700 (d) 140
  4. 4.Round 59307 to the nearest ten.
  5. 5.Round 17646 to the nearest ten.
  6. 6.Which is closest to 301 + 204 + 499? (a) 1000 (b) 900 (c) 1100 (d) 1200
  7. 7.Which is closest to 399 + 600 + 295? (a) 1300 (b) 1200 (c) 1500 (d) 1400
  8. 8.Round 29.54 to one decimal place. =
  9. 9.Round 91.93 to one decimal place. =
  10. 10.Which is closest to 2094 ÷ 31? (a) 70 (b) 700 (c) 35 (d) 140
  11. 11.Which is closest to 1803 ÷ 21? (a) 180 (b) 900 (c) 45 (d) 90
  12. 12.Which is closest to 497 + 595 + 105? (a) 1100 (b) 1200 (c) 1300 (d) 1400
  13. 13.Which is closest to 4002 ÷ 49? (a) 80 (b) 160 (c) 40 (d) 800
  14. 14.Which is closest to 909 ÷ 29? (a) 15 (b) 60 (c) 30 (d) 300
  15. 15.Round 67.51 to one decimal place. =
  16. 16.Which is closest to 498 + 396 + 498? (a) 1300 (b) 1400 (c) 1600 (d) 1500
  17. 17.Round 66.67 to one decimal place. =
  18. 18.Round 46.46 to one decimal place. =
  19. 19.Which is closest to 398 × 59? (Round each number first.) (a) 24000 (b) 240000 (c) 2400 (d) 48000
  20. 20.Round 58684 to the nearest thousand.
  21. 21.Round 8162 to the nearest thousand.
  22. 22.Round 88151 to the nearest thousand.
  23. 23.Which is closest to 901 × 50? (Round each number first.) (a) 45000 (b) 90000 (c) 450000 (d) 4500
  24. 24.Which is closest to 104 + 900 + 700? (a) 1900 (b) 1800 (c) 1700 (d) 1600
  25. 25.Which is closest to 906 ÷ 31? (a) 60 (b) 15 (c) 300 (d) 30
  26. 26.Which is closest to 199 × 38? (Round each number first.) (a) 80000 (b) 800 (c) 16000 (d) 8000
  27. 27.Which is closest to 499 + 702 + 96? (a) 1200 (b) 1400 (c) 1500 (d) 1300
  28. 28.Round 13446 to the nearest thousand.
  29. 29.Which is closest to 1194 ÷ 41? (a) 60 (b) 15 (c) 300 (d) 30
  30. 30.Which is closest to 3493 ÷ 49? (a) 70 (b) 35 (c) 140 (d) 700
  31. 31.Round 86.11 to one decimal place. =
  32. 32.Which is closest to 1805 ÷ 21? (a) 45 (b) 180 (c) 90 (d) 900
  33. 33.Round 8820 to the nearest thousand.
  34. 34.Which is closest to 205 + 295 + 398? (a) 800 (b) 1000 (c) 1100 (d) 900
  35. 35.Which is closest to 904 + 797 + 201? (a) 2100 (b) 1800 (c) 1900 (d) 2000
  36. 36.Round 70673 to the nearest ten.
  37. 37.Round 69.21 to one decimal place. =
  38. 38.Round 92477 to the nearest thousand.
  39. 39.Which is closest to 802 × 62? (Round each number first.) (a) 48000 (b) 96000 (c) 480000 (d) 4800
  40. 40.Which is closest to 403 × 59? (Round each number first.) (a) 24000 (b) 240000 (c) 48000 (d) 2400

Answer key

  1. 75000
  2. 21000
  3. 70
  4. 59310
  5. 17650
  6. 1000
  7. 1300
  8. 29.5
  9. 91.9
  10. 70
  11. 90
  12. 1200
  13. 80
  14. 30
  15. 67.5
  16. 1400
  17. 66.7
  18. 46.5
  19. 24000
  20. 59000
  21. 8000
  22. 88000
  23. 45000
  24. 1700
  25. 30
  26. 8000
  27. 1300
  28. 13000
  29. 30
  30. 70
  31. 86.1
  32. 90
  33. 9000
  34. 900
  35. 1900
  36. 70670
  37. 69.2
  38. 92000
  39. 48000
  40. 24000

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