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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 308 · 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 901 + 800 + 597? (a) 2500 (b) 2300 (c) 2200 (d) 2400
  2. 2.Round 98548 to the nearest ten.
  3. 3.Round 82768 to the nearest hundred.
  4. 4.Round 50.46 to one decimal place. =
  5. 5.Which is closest to 503 × 41? (Round each number first.) (a) 2000 (b) 20000 (c) 200000 (d) 40000
  6. 6.Which is closest to 599 ÷ 19? (a) 300 (b) 30 (c) 15 (d) 60
  7. 7.Round 90.69 to one decimal place. =
  8. 8.Which is closest to 98 + 205 + 195? (a) 600 (b) 500 (c) 700 (d) 400
  9. 9.Round 74553 to the nearest thousand.
  10. 10.Which is closest to 704 + 798 + 502? (a) 2200 (b) 1900 (c) 2100 (d) 2000
  11. 11.Which is closest to 698 + 703 + 801? (a) 2300 (b) 2100 (c) 2400 (d) 2200
  12. 12.Which is closest to 902 × 38? (Round each number first.) (a) 36000 (b) 3600 (c) 72000 (d) 360000
  13. 13.Round 10064 to the nearest thousand.
  14. 14.Round 78.73 to one decimal place. =
  15. 15.Which is closest to 2698 ÷ 31? (a) 900 (b) 45 (c) 90 (d) 180
  16. 16.Which is closest to 403 + 297 + 395? (a) 1100 (b) 1200 (c) 1000 (d) 1300
  17. 17.Which is closest to 303 × 48? (Round each number first.) (a) 1500 (b) 15000 (c) 30000 (d) 150000
  18. 18.Which is closest to 2100 ÷ 31? (a) 700 (b) 140 (c) 70 (d) 35
  19. 19.Round 26372 to the nearest ten.
  20. 20.Which is closest to 198 × 88? (Round each number first.) (a) 36000 (b) 180000 (c) 1800 (d) 18000
  21. 21.Round 94.82 to one decimal place. =
  22. 22.Round 19.27 to one decimal place. =
  23. 23.Which is closest to 1793 ÷ 29? (a) 30 (b) 600 (c) 60 (d) 120
  24. 24.Round 65.56 to one decimal place. =
  25. 25.Round 98.27 to one decimal place. =
  26. 26.Which is closest to 599 + 596 + 801? (a) 2100 (b) 1900 (c) 2000 (d) 2200
  27. 27.Which is closest to 696 + 600 + 796? (a) 2300 (b) 2000 (c) 2100 (d) 2200
  28. 28.Which is closest to 297 + 605 + 596? (a) 1600 (b) 1700 (c) 1400 (d) 1500
  29. 29.Round 9578 to the nearest thousand.
  30. 30.Round 86.46 to one decimal place. =
  31. 31.Which is closest to 4502 ÷ 49? (a) 900 (b) 45 (c) 180 (d) 90
  32. 32.Round 11659 to the nearest ten.
  33. 33.Which is closest to 201 + 296 + 100? (a) 700 (b) 600 (c) 800 (d) 500
  34. 34.Round 96260 to the nearest thousand.
  35. 35.Which is closest to 499 + 97 + 198? (a) 900 (b) 700 (c) 800 (d) 1000
  36. 36.Round 82.74 to one decimal place. =
  37. 37.Which is closest to 400 + 296 + 697? (a) 1300 (b) 1400 (c) 1500 (d) 1600
  38. 38.Which is closest to 304 × 71? (Round each number first.) (a) 21000 (b) 2100 (c) 42000 (d) 210000
  39. 39.Round 59.52 to one decimal place. =
  40. 40.Round 61827 to the nearest thousand.

Answer key

  1. 2300
  2. 98550
  3. 82800
  4. 50.5
  5. 20000
  6. 30
  7. 90.7
  8. 500
  9. 75000
  10. 2000
  11. 2200
  12. 36000
  13. 10000
  14. 78.7
  15. 90
  16. 1100
  17. 15000
  18. 70
  19. 26370
  20. 18000
  21. 94.8
  22. 19.3
  23. 60
  24. 65.6
  25. 98.3
  26. 2000
  27. 2100
  28. 1500
  29. 10000
  30. 86.5
  31. 90
  32. 11660
  33. 600
  34. 96000
  35. 800
  36. 82.7
  37. 1400
  38. 21000
  39. 59.5
  40. 62000

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