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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 832 · 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 799 × 58? (Round each number first.) (a) 4800 (b) 96000 (c) 480000 (d) 48000
  2. 2.Round 69.17 to one decimal place. =
  3. 3.Round 29.67 to one decimal place. =
  4. 4.Which is closest to 497 × 58? (Round each number first.) (a) 300000 (b) 3000 (c) 30000 (d) 60000
  5. 5.Round 96026 to the nearest ten.
  6. 6.Round 8110 to the nearest thousand.
  7. 7.Which is closest to 994 ÷ 49? (a) 40 (b) 20 (c) 10 (d) 200
  8. 8.Which is closest to 596 × 19? (Round each number first.) (a) 1200 (b) 12000 (c) 24000 (d) 120000
  9. 9.Which is closest to 496 + 595 + 695? (a) 2000 (b) 1900 (c) 1700 (d) 1800
  10. 10.Which is closest to 302 × 61? (Round each number first.) (a) 180000 (b) 36000 (c) 1800 (d) 18000
  11. 11.Which is closest to 800 × 62? (Round each number first.) (a) 96000 (b) 48000 (c) 480000 (d) 4800
  12. 12.Round 30.36 to one decimal place. =
  13. 13.Which is closest to 896 × 49? (Round each number first.) (a) 450000 (b) 90000 (c) 45000 (d) 4500
  14. 14.Which is closest to 699 × 90? (Round each number first.) (a) 630000 (b) 6300 (c) 126000 (d) 63000
  15. 15.Round 13681 to the nearest ten.
  16. 16.Which is closest to 2501 ÷ 49? (a) 500 (b) 50 (c) 25 (d) 100
  17. 17.Round 70.47 to one decimal place. =
  18. 18.Which is closest to 1192 ÷ 21? (a) 60 (b) 600 (c) 120 (d) 30
  19. 19.Which is closest to 196 × 80? (Round each number first.) (a) 160000 (b) 1600 (c) 16000 (d) 32000
  20. 20.Which is closest to 2000 ÷ 51? (a) 400 (b) 40 (c) 20 (d) 80
  21. 21.Round 52.59 to one decimal place. =
  22. 22.Round 47277 to the nearest thousand.
  23. 23.Round 69046 to the nearest ten.
  24. 24.Round 81.09 to one decimal place. =
  25. 25.Which is closest to 96 + 401 + 395? (a) 900 (b) 800 (c) 1100 (d) 1000
  26. 26.Which is closest to 696 + 95 + 95? (a) 800 (b) 1100 (c) 900 (d) 1000
  27. 27.Which is closest to 1193 ÷ 19? (a) 30 (b) 60 (c) 120 (d) 600
  28. 28.Which is closest to 296 × 42? (Round each number first.) (a) 120000 (b) 1200 (c) 24000 (d) 12000
  29. 29.Which is closest to 1204 ÷ 41? (a) 30 (b) 300 (c) 60 (d) 15
  30. 30.Round 7677 to the nearest ten.
  31. 31.Which is closest to 2406 ÷ 39? (a) 30 (b) 60 (c) 120 (d) 600
  32. 32.Which is closest to 196 × 91? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
  33. 33.Which is closest to 799 + 197 + 297? (a) 1400 (b) 1500 (c) 1300 (d) 1200
  34. 34.Which is closest to 200 × 52? (Round each number first.) (a) 1000 (b) 10000 (c) 20000 (d) 100000
  35. 35.Which is closest to 497 + 700 + 301? (a) 1600 (b) 1500 (c) 1400 (d) 1700
  36. 36.Round 21.06 to one decimal place. =
  37. 37.Round 11463 to the nearest thousand.
  38. 38.Round 61.62 to one decimal place. =
  39. 39.Which is closest to 2809 ÷ 41? (a) 70 (b) 140 (c) 35 (d) 700
  40. 40.Round 20.06 to one decimal place. =

Answer key

  1. 48000
  2. 69.2
  3. 29.7
  4. 30000
  5. 96030
  6. 8000
  7. 20
  8. 12000
  9. 1800
  10. 18000
  11. 48000
  12. 30.4
  13. 45000
  14. 63000
  15. 13680
  16. 50
  17. 70.5
  18. 60
  19. 16000
  20. 40
  21. 52.6
  22. 47000
  23. 69050
  24. 81.1
  25. 900
  26. 900
  27. 60
  28. 12000
  29. 30
  30. 7680
  31. 60
  32. 18000
  33. 1300
  34. 10000
  35. 1500
  36. 21.1
  37. 11000
  38. 61.6
  39. 70
  40. 20.1

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