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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 973 · 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 2697 ÷ 29? (a) 90 (b) 45 (c) 900 (d) 180
  2. 2.Round 56.27 to one decimal place. =
  3. 3.Which is closest to 698 × 29? (Round each number first.) (a) 42000 (b) 210000 (c) 2100 (d) 21000
  4. 4.Which is closest to 502 × 29? (Round each number first.) (a) 30000 (b) 15000 (c) 1500 (d) 150000
  5. 5.Which is closest to 1002 ÷ 49? (a) 40 (b) 200 (c) 10 (d) 20
  6. 6.Which is closest to 898 + 904 + 102? (a) 2000 (b) 2100 (c) 1800 (d) 1900
  7. 7.Which is closest to 1195 ÷ 29? (a) 80 (b) 40 (c) 400 (d) 20
  8. 8.Round 36819 to the nearest thousand.
  9. 9.Round 16.86 to one decimal place. =
  10. 10.Which is closest to 1796 ÷ 21? (a) 90 (b) 900 (c) 45 (d) 180
  11. 11.Round 58416 to the nearest thousand.
  12. 12.Round 28.73 to one decimal place. =
  13. 13.Which is closest to 296 × 31? (Round each number first.) (a) 900 (b) 9000 (c) 18000 (d) 90000
  14. 14.Round 42941 to the nearest thousand.
  15. 15.Which is closest to 299 + 805 + 801? (a) 1800 (b) 2000 (c) 1900 (d) 2100
  16. 16.Which is closest to 696 × 70? (Round each number first.) (a) 490000 (b) 4900 (c) 98000 (d) 49000
  17. 17.Which is closest to 599 × 42? (Round each number first.) (a) 240000 (b) 24000 (c) 2400 (d) 48000
  18. 18.Round 74043 to the nearest thousand.
  19. 19.Which is closest to 96 + 905 + 605? (a) 1600 (b) 1800 (c) 1500 (d) 1700
  20. 20.Which is closest to 604 × 92? (Round each number first.) (a) 108000 (b) 5400 (c) 540000 (d) 54000
  21. 21.Which is closest to 2391 ÷ 29? (a) 80 (b) 160 (c) 40 (d) 800
  22. 22.Round 24783 to the nearest thousand.
  23. 23.Round 27085 to the nearest hundred.
  24. 24.Which is closest to 500 × 52? (Round each number first.) (a) 2500 (b) 250000 (c) 50000 (d) 25000
  25. 25.Which is closest to 1396 ÷ 19? (a) 700 (b) 35 (c) 70 (d) 140
  26. 26.Round 28.64 to one decimal place. =
  27. 27.Round 17.13 to one decimal place. =
  28. 28.Round 30.28 to one decimal place. =
  29. 29.Round 94279 to the nearest ten.
  30. 30.Which is closest to 498 + 396 + 295? (a) 1300 (b) 1400 (c) 1200 (d) 1100
  31. 31.Which is closest to 797 × 42? (Round each number first.) (a) 3200 (b) 32000 (c) 64000 (d) 320000
  32. 32.Round 11.81 to one decimal place. =
  33. 33.Round 28.69 to one decimal place. =
  34. 34.Round 82.94 to one decimal place. =
  35. 35.Which is closest to 1205 ÷ 39? (a) 30 (b) 60 (c) 15 (d) 300
  36. 36.Which is closest to 399 ÷ 19? (a) 200 (b) 40 (c) 10 (d) 20
  37. 37.Round 24.68 to one decimal place. =
  38. 38.Round 75667 to the nearest hundred.
  39. 39.Round 22569 to the nearest ten.
  40. 40.Which is closest to 698 + 604 + 295? (a) 1700 (b) 1600 (c) 1500 (d) 1800

Answer key

  1. 90
  2. 56.3
  3. 21000
  4. 15000
  5. 20
  6. 1900
  7. 40
  8. 37000
  9. 16.9
  10. 90
  11. 58000
  12. 28.7
  13. 9000
  14. 43000
  15. 1900
  16. 49000
  17. 24000
  18. 74000
  19. 1600
  20. 54000
  21. 80
  22. 25000
  23. 27100
  24. 25000
  25. 70
  26. 28.6
  27. 17.1
  28. 30.3
  29. 94280
  30. 1200
  31. 32000
  32. 11.8
  33. 28.7
  34. 82.9
  35. 30
  36. 20
  37. 24.7
  38. 75700
  39. 22570
  40. 1600

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