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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 905 · 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 63768 to the nearest hundred.
  2. 2.Which is closest to 2395 ÷ 39? (a) 60 (b) 120 (c) 600 (d) 30
  3. 3.Round 49095 to the nearest hundred.
  4. 4.Which is closest to 204 + 295 + 399? (a) 1000 (b) 800 (c) 900 (d) 1100
  5. 5.Round 94402 to the nearest ten.
  6. 6.Which is closest to 995 ÷ 51? (a) 20 (b) 10 (c) 40 (d) 200
  7. 7.Which is closest to 300 × 51? (Round each number first.) (a) 30000 (b) 150000 (c) 1500 (d) 15000
  8. 8.Which is closest to 495 + 701 + 302? (a) 1500 (b) 1600 (c) 1400 (d) 1700
  9. 9.Which is closest to 999 ÷ 51? (a) 10 (b) 40 (c) 20 (d) 200
  10. 10.Which is closest to 96 + 101 + 397? (a) 500 (b) 600 (c) 800 (d) 700
  11. 11.Round 47747 to the nearest thousand.
  12. 12.Round 71027 to the nearest thousand.
  13. 13.Round 48.47 to one decimal place. =
  14. 14.Which is closest to 701 × 61? (Round each number first.) (a) 84000 (b) 42000 (c) 4200 (d) 420000
  15. 15.Round 52.72 to one decimal place. =
  16. 16.Which is closest to 103 + 697 + 596? (a) 1500 (b) 1300 (c) 1600 (d) 1400
  17. 17.Which is closest to 398 ÷ 19? (a) 200 (b) 40 (c) 10 (d) 20
  18. 18.Round 73395 to the nearest thousand.
  19. 19.Which is closest to 1404 ÷ 19? (a) 35 (b) 70 (c) 140 (d) 700
  20. 20.Which is closest to 391 ÷ 19? (a) 20 (b) 10 (c) 40 (d) 200
  21. 21.Which is closest to 803 × 39? (Round each number first.) (a) 3200 (b) 32000 (c) 64000 (d) 320000
  22. 22.Which is closest to 197 × 50? (Round each number first.) (a) 20000 (b) 1000 (c) 10000 (d) 100000
  23. 23.Which is closest to 295 + 96 + 199? (a) 500 (b) 800 (c) 700 (d) 600
  24. 24.Round 57640 to the nearest hundred.
  25. 25.Which is closest to 897 × 68? (Round each number first.) (a) 6300 (b) 630000 (c) 63000 (d) 126000
  26. 26.Which is closest to 1206 ÷ 29? (a) 400 (b) 80 (c) 20 (d) 40
  27. 27.Round 79.46 to one decimal place. =
  28. 28.Which is closest to 791 ÷ 41? (a) 40 (b) 20 (c) 200 (d) 10
  29. 29.Which is closest to 301 + 800 + 604? (a) 1700 (b) 1900 (c) 1600 (d) 1800
  30. 30.Which is closest to 797 × 28? (Round each number first.) (a) 240000 (b) 2400 (c) 24000 (d) 48000
  31. 31.Which is closest to 502 + 898 + 297? (a) 1900 (b) 1600 (c) 1700 (d) 1800
  32. 32.Which is closest to 496 × 22? (Round each number first.) (a) 10000 (b) 100000 (c) 1000 (d) 20000
  33. 33.Which is closest to 497 + 196 + 298? (a) 1000 (b) 900 (c) 1100 (d) 1200
  34. 34.Round 22.74 to one decimal place. =
  35. 35.Which is closest to 198 + 396 + 496? (a) 1200 (b) 1000 (c) 1300 (d) 1100
  36. 36.Which is closest to 4002 ÷ 51? (a) 800 (b) 160 (c) 40 (d) 80
  37. 37.Round 42.59 to one decimal place. =
  38. 38.Round 48.32 to one decimal place. =
  39. 39.Which is closest to 596 + 900 + 604? (a) 2200 (b) 2000 (c) 2300 (d) 2100
  40. 40.Which is closest to 1991 ÷ 39? (a) 500 (b) 25 (c) 100 (d) 50

Answer key

  1. 63800
  2. 60
  3. 49100
  4. 900
  5. 94400
  6. 20
  7. 15000
  8. 1500
  9. 20
  10. 600
  11. 48000
  12. 71000
  13. 48.5
  14. 42000
  15. 52.7
  16. 1400
  17. 20
  18. 73000
  19. 70
  20. 20
  21. 32000
  22. 10000
  23. 600
  24. 57600
  25. 63000
  26. 40
  27. 79.5
  28. 20
  29. 1700
  30. 24000
  31. 1700
  32. 10000
  33. 1000
  34. 22.7
  35. 1100
  36. 80
  37. 42.6
  38. 48.3
  39. 2100
  40. 50

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