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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 699 · 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 62.69 to one decimal place. =
  2. 2.Round 29554 to the nearest ten.
  3. 3.Which is closest to 697 × 89? (Round each number first.) (a) 63000 (b) 126000 (c) 630000 (d) 6300
  4. 4.Which is closest to 801 + 96 + 101? (a) 900 (b) 1200 (c) 1000 (d) 1100
  5. 5.Round 99253 to the nearest ten.
  6. 6.Round 35.81 to one decimal place. =
  7. 7.Round 38986 to the nearest ten.
  8. 8.Which is closest to 398 + 97 + 805? (a) 1300 (b) 1500 (c) 1400 (d) 1200
  9. 9.Which is closest to 401 + 202 + 901? (a) 1400 (b) 1500 (c) 1700 (d) 1600
  10. 10.Round 65768 to the nearest ten.
  11. 11.Which is closest to 296 × 82? (Round each number first.) (a) 240000 (b) 2400 (c) 48000 (d) 24000
  12. 12.Which is closest to 800 + 399 + 597? (a) 1800 (b) 1900 (c) 1700 (d) 2000
  13. 13.Which is closest to 299 × 70? (Round each number first.) (a) 42000 (b) 21000 (c) 2100 (d) 210000
  14. 14.Which is closest to 504 × 91? (Round each number first.) (a) 90000 (b) 450000 (c) 4500 (d) 45000
  15. 15.Round 67046 to the nearest ten.
  16. 16.Round 35563 to the nearest ten.
  17. 17.Which is closest to 504 + 100 + 95? (a) 900 (b) 600 (c) 700 (d) 800
  18. 18.Which is closest to 97 + 600 + 498? (a) 1100 (b) 1400 (c) 1200 (d) 1300
  19. 19.Which is closest to 1998 ÷ 41? (a) 500 (b) 100 (c) 25 (d) 50
  20. 20.Which is closest to 102 + 105 + 696? (a) 1000 (b) 1100 (c) 800 (d) 900
  21. 21.Which is closest to 498 + 700 + 897? (a) 2000 (b) 2200 (c) 2300 (d) 2100
  22. 22.Round 82.27 to one decimal place. =
  23. 23.Which is closest to 901 × 60? (Round each number first.) (a) 540000 (b) 54000 (c) 108000 (d) 5400
  24. 24.Which is closest to 2700 ÷ 31? (a) 45 (b) 180 (c) 90 (d) 900
  25. 25.Which is closest to 1202 ÷ 41? (a) 30 (b) 300 (c) 15 (d) 60
  26. 26.Which is closest to 2001 ÷ 41? (a) 100 (b) 500 (c) 25 (d) 50
  27. 27.Round 7385 to the nearest thousand.
  28. 28.Which is closest to 305 + 905 + 804? (a) 2100 (b) 2200 (c) 1900 (d) 2000
  29. 29.Which is closest to 801 × 29? (Round each number first.) (a) 2400 (b) 240000 (c) 24000 (d) 48000
  30. 30.Round 74.82 to one decimal place. =
  31. 31.Which is closest to 697 × 72? (Round each number first.) (a) 490000 (b) 4900 (c) 49000 (d) 98000
  32. 32.Round 34.21 to one decimal place. =
  33. 33.Round 30872 to the nearest thousand.
  34. 34.Round 98.69 to one decimal place. =
  35. 35.Round 84.69 to one decimal place. =
  36. 36.Round 15.92 to one decimal place. =
  37. 37.Which is closest to 2392 ÷ 41? (a) 600 (b) 120 (c) 30 (d) 60
  38. 38.Which is closest to 603 × 81? (Round each number first.) (a) 96000 (b) 480000 (c) 4800 (d) 48000
  39. 39.Round 13534 to the nearest ten.
  40. 40.Which is closest to 2998 ÷ 49? (a) 600 (b) 60 (c) 30 (d) 120

Answer key

  1. 62.7
  2. 29550
  3. 63000
  4. 1000
  5. 99250
  6. 35.8
  7. 38990
  8. 1300
  9. 1500
  10. 65770
  11. 24000
  12. 1800
  13. 21000
  14. 45000
  15. 67050
  16. 35560
  17. 700
  18. 1200
  19. 50
  20. 900
  21. 2100
  22. 82.3
  23. 54000
  24. 90
  25. 30
  26. 50
  27. 7000
  28. 2000
  29. 24000
  30. 74.8
  31. 49000
  32. 34.2
  33. 31000
  34. 98.7
  35. 84.7
  36. 15.9
  37. 60
  38. 48000
  39. 13530
  40. 60

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