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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 364 · 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 1198 ÷ 29? (a) 400 (b) 20 (c) 80 (d) 40
  2. 2.Round 35.86 to one decimal place. =
  3. 3.Which is closest to 501 × 29? (Round each number first.) (a) 150000 (b) 15000 (c) 1500 (d) 30000
  4. 4.Which is closest to 201 + 796 + 96? (a) 1200 (b) 1000 (c) 1300 (d) 1100
  5. 5.Round 17059 to the nearest thousand.
  6. 6.Which is closest to 201 × 81? (Round each number first.) (a) 1600 (b) 160000 (c) 32000 (d) 16000
  7. 7.Which is closest to 202 × 41? (Round each number first.) (a) 80000 (b) 16000 (c) 8000 (d) 800
  8. 8.Round 17.34 to one decimal place. =
  9. 9.Round 77.47 to one decimal place. =
  10. 10.Round 24.24 to one decimal place. =
  11. 11.Round 74.77 to one decimal place. =
  12. 12.Round 77.37 to one decimal place. =
  13. 13.Which is closest to 698 + 302 + 795? (a) 2000 (b) 1900 (c) 1800 (d) 1700
  14. 14.Which is closest to 301 + 199 + 702? (a) 1100 (b) 1200 (c) 1400 (d) 1300
  15. 15.Round 17.08 to one decimal place. =
  16. 16.Round 73.66 to one decimal place. =
  17. 17.Round 12.21 to one decimal place. =
  18. 18.Which is closest to 397 ÷ 19? (a) 200 (b) 40 (c) 20 (d) 10
  19. 19.Round 24257 to the nearest ten.
  20. 20.Which is closest to 298 × 50? (Round each number first.) (a) 150000 (b) 15000 (c) 30000 (d) 1500
  21. 21.Round 32.27 to one decimal place. =
  22. 22.Round 75.91 to one decimal place. =
  23. 23.Which is closest to 895 + 896 + 97? (a) 1800 (b) 2100 (c) 1900 (d) 2000
  24. 24.Round 82.82 to one decimal place. =
  25. 25.Which is closest to 605 + 295 + 805? (a) 1900 (b) 1800 (c) 1600 (d) 1700
  26. 26.Round 25.32 to one decimal place. =
  27. 27.Round 37780 to the nearest thousand.
  28. 28.Which is closest to 3602 ÷ 41? (a) 900 (b) 45 (c) 180 (d) 90
  29. 29.Which is closest to 801 × 31? (Round each number first.) (a) 240000 (b) 48000 (c) 24000 (d) 2400
  30. 30.Which is closest to 1197 ÷ 41? (a) 15 (b) 30 (c) 300 (d) 60
  31. 31.Which is closest to 398 + 202 + 801? (a) 1500 (b) 1300 (c) 1400 (d) 1600
  32. 32.Round 80.22 to one decimal place. =
  33. 33.Which is closest to 1003 ÷ 51? (a) 10 (b) 20 (c) 200 (d) 40
  34. 34.Which is closest to 605 + 697 + 496? (a) 2000 (b) 1900 (c) 1800 (d) 1700
  35. 35.Which is closest to 101 + 603 + 602? (a) 1200 (b) 1400 (c) 1300 (d) 1500
  36. 36.Which is closest to 196 × 81? (Round each number first.) (a) 16000 (b) 32000 (c) 1600 (d) 160000
  37. 37.Round 72069 to the nearest hundred.
  38. 38.Which is closest to 197 + 896 + 697? (a) 1700 (b) 1900 (c) 2000 (d) 1800
  39. 39.Which is closest to 896 × 28? (Round each number first.) (a) 270000 (b) 27000 (c) 54000 (d) 2700
  40. 40.Round 47279 to the nearest hundred.

Answer key

  1. 40
  2. 35.9
  3. 15000
  4. 1100
  5. 17000
  6. 16000
  7. 8000
  8. 17.3
  9. 77.5
  10. 24.2
  11. 74.8
  12. 77.4
  13. 1800
  14. 1200
  15. 17.1
  16. 73.7
  17. 12.2
  18. 20
  19. 24260
  20. 15000
  21. 32.3
  22. 75.9
  23. 1900
  24. 82.8
  25. 1700
  26. 25.3
  27. 38000
  28. 90
  29. 24000
  30. 30
  31. 1400
  32. 80.2
  33. 20
  34. 1800
  35. 1300
  36. 16000
  37. 72100
  38. 1800
  39. 27000
  40. 47300

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