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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 498 · 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 904 × 42? (Round each number first.) (a) 72000 (b) 3600 (c) 360000 (d) 36000
  2. 2.Round 17262 to the nearest ten.
  3. 3.Which is closest to 895 + 404 + 205? (a) 1700 (b) 1400 (c) 1500 (d) 1600
  4. 4.Which is closest to 499 × 58? (Round each number first.) (a) 30000 (b) 3000 (c) 300000 (d) 60000
  5. 5.Which is closest to 803 × 41? (Round each number first.) (a) 320000 (b) 64000 (c) 3200 (d) 32000
  6. 6.Which is closest to 1602 ÷ 21? (a) 160 (b) 80 (c) 800 (d) 40
  7. 7.Which is closest to 102 + 601 + 905? (a) 1500 (b) 1600 (c) 1800 (d) 1700
  8. 8.Which is closest to 797 + 99 + 797? (a) 1800 (b) 1600 (c) 1900 (d) 1700
  9. 9.Which is closest to 198 + 797 + 501? (a) 1500 (b) 1700 (c) 1400 (d) 1600
  10. 10.Round 52588 to the nearest ten.
  11. 11.Round 59.92 to one decimal place. =
  12. 12.Round 91.43 to one decimal place. =
  13. 13.Which is closest to 1507 ÷ 31? (a) 100 (b) 50 (c) 500 (d) 25
  14. 14.Which is closest to 1203 ÷ 31? (a) 40 (b) 20 (c) 80 (d) 400
  15. 15.Which is closest to 701 × 39? (Round each number first.) (a) 28000 (b) 56000 (c) 2800 (d) 280000
  16. 16.Which is closest to 298 × 52? (Round each number first.) (a) 30000 (b) 15000 (c) 150000 (d) 1500
  17. 17.Which is closest to 903 + 105 + 595? (a) 1700 (b) 1500 (c) 1800 (d) 1600
  18. 18.Which is closest to 600 + 196 + 296? (a) 1200 (b) 1000 (c) 1100 (d) 1300
  19. 19.Which is closest to 597 × 78? (Round each number first.) (a) 480000 (b) 48000 (c) 96000 (d) 4800
  20. 20.Which is closest to 795 + 698 + 396? (a) 1800 (b) 2100 (c) 2000 (d) 1900
  21. 21.Which is closest to 2391 ÷ 39? (a) 600 (b) 30 (c) 120 (d) 60
  22. 22.Round 5487 to the nearest hundred.
  23. 23.Which is closest to 595 + 495 + 396? (a) 1500 (b) 1600 (c) 1400 (d) 1700
  24. 24.Which is closest to 805 + 295 + 399? (a) 1400 (b) 1600 (c) 1700 (d) 1500
  25. 25.Which is closest to 899 ÷ 31? (a) 300 (b) 60 (c) 30 (d) 15
  26. 26.Which is closest to 296 + 104 + 795? (a) 1400 (b) 1100 (c) 1300 (d) 1200
  27. 27.Round 26.13 to one decimal place. =
  28. 28.Which is closest to 897 × 72? (Round each number first.) (a) 630000 (b) 63000 (c) 6300 (d) 126000
  29. 29.Which is closest to 3997 ÷ 49? (a) 40 (b) 80 (c) 800 (d) 160
  30. 30.Which is closest to 3194 ÷ 41? (a) 40 (b) 80 (c) 800 (d) 160
  31. 31.Round 98952 to the nearest ten.
  32. 32.Round 53246 to the nearest ten.
  33. 33.Which is closest to 401 × 38? (Round each number first.) (a) 1600 (b) 160000 (c) 32000 (d) 16000
  34. 34.Which is closest to 1599 ÷ 19? (a) 80 (b) 800 (c) 160 (d) 40
  35. 35.Which is closest to 199 × 59? (Round each number first.) (a) 24000 (b) 1200 (c) 12000 (d) 120000
  36. 36.Which is closest to 799 + 204 + 801? (a) 1900 (b) 1700 (c) 1800 (d) 2000
  37. 37.Round 95294 to the nearest ten.
  38. 38.Which is closest to 505 + 400 + 202? (a) 1300 (b) 1000 (c) 1200 (d) 1100
  39. 39.Which is closest to 96 + 302 + 198? (a) 700 (b) 500 (c) 600 (d) 800
  40. 40.Round 24.93 to one decimal place. =

Answer key

  1. 36000
  2. 17260
  3. 1500
  4. 30000
  5. 32000
  6. 80
  7. 1600
  8. 1700
  9. 1500
  10. 52590
  11. 59.9
  12. 91.4
  13. 50
  14. 40
  15. 28000
  16. 15000
  17. 1600
  18. 1100
  19. 48000
  20. 1900
  21. 60
  22. 5500
  23. 1500
  24. 1500
  25. 30
  26. 1200
  27. 26.1
  28. 63000
  29. 80
  30. 80
  31. 98950
  32. 53250
  33. 16000
  34. 80
  35. 12000
  36. 1800
  37. 95290
  38. 1100
  39. 600
  40. 24.9

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