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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 348 · 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 2993 ÷ 49? (a) 120 (b) 30 (c) 600 (d) 60
  2. 2.Which is closest to 204 + 99 + 298? (a) 500 (b) 700 (c) 800 (d) 600
  3. 3.Which is closest to 901 × 52? (Round each number first.) (a) 90000 (b) 4500 (c) 450000 (d) 45000
  4. 4.Which is closest to 898 × 80? (Round each number first.) (a) 144000 (b) 7200 (c) 72000 (d) 720000
  5. 5.Which is closest to 698 + 703 + 798? (a) 2100 (b) 2200 (c) 2400 (d) 2300
  6. 6.Round 84.38 to one decimal place. =
  7. 7.Round 94.17 to one decimal place. =
  8. 8.Which is closest to 2503 ÷ 51? (a) 100 (b) 500 (c) 25 (d) 50
  9. 9.Which is closest to 301 + 800 + 499? (a) 1700 (b) 1800 (c) 1600 (d) 1500
  10. 10.Which is closest to 301 + 401 + 403? (a) 1000 (b) 1300 (c) 1200 (d) 1100
  11. 11.Round 40219 to the nearest hundred.
  12. 12.Which is closest to 903 + 299 + 96? (a) 1500 (b) 1300 (c) 1200 (d) 1400
  13. 13.Round 22567 to the nearest hundred.
  14. 14.Which is closest to 404 × 38? (Round each number first.) (a) 160000 (b) 32000 (c) 16000 (d) 1600
  15. 15.Which is closest to 1604 ÷ 39? (a) 400 (b) 80 (c) 20 (d) 40
  16. 16.Which is closest to 200 + 496 + 497? (a) 1400 (b) 1300 (c) 1200 (d) 1100
  17. 17.Which is closest to 295 + 396 + 201? (a) 1000 (b) 800 (c) 900 (d) 1100
  18. 18.Round 7525 to the nearest hundred.
  19. 19.Which is closest to 3494 ÷ 49? (a) 35 (b) 70 (c) 700 (d) 140
  20. 20.Round 36618 to the nearest thousand.
  21. 21.Round 82.32 to one decimal place. =
  22. 22.Which is closest to 804 × 92? (Round each number first.) (a) 144000 (b) 72000 (c) 7200 (d) 720000
  23. 23.Which is closest to 3602 ÷ 39? (a) 180 (b) 90 (c) 900 (d) 45
  24. 24.Round 52.28 to one decimal place. =
  25. 25.Which is closest to 201 × 69? (Round each number first.) (a) 28000 (b) 1400 (c) 14000 (d) 140000
  26. 26.Which is closest to 809 ÷ 41? (a) 10 (b) 200 (c) 20 (d) 40
  27. 27.Round 23277 to the nearest ten.
  28. 28.Which is closest to 2107 ÷ 31? (a) 700 (b) 35 (c) 70 (d) 140
  29. 29.Round 10854 to the nearest ten.
  30. 30.Which is closest to 2505 ÷ 49? (a) 25 (b) 100 (c) 50 (d) 500
  31. 31.Round 10.22 to one decimal place. =
  32. 32.Round 24178 to the nearest hundred.
  33. 33.Round 90.94 to one decimal place. =
  34. 34.Which is closest to 2808 ÷ 41? (a) 70 (b) 35 (c) 140 (d) 700
  35. 35.Which is closest to 1005 ÷ 19? (a) 25 (b) 500 (c) 50 (d) 100
  36. 36.Which is closest to 1194 ÷ 29? (a) 20 (b) 400 (c) 40 (d) 80
  37. 37.Which is closest to 101 + 403 + 299? (a) 1000 (b) 800 (c) 700 (d) 900
  38. 38.Which is closest to 904 × 48? (Round each number first.) (a) 450000 (b) 45000 (c) 4500 (d) 90000
  39. 39.Round 96861 to the nearest thousand.
  40. 40.Which is closest to 600 × 19? (Round each number first.) (a) 120000 (b) 1200 (c) 12000 (d) 24000

Answer key

  1. 60
  2. 600
  3. 45000
  4. 72000
  5. 2200
  6. 84.4
  7. 94.2
  8. 50
  9. 1600
  10. 1100
  11. 40200
  12. 1300
  13. 22600
  14. 16000
  15. 40
  16. 1200
  17. 900
  18. 7500
  19. 70
  20. 37000
  21. 82.3
  22. 72000
  23. 90
  24. 52.3
  25. 14000
  26. 20
  27. 23280
  28. 70
  29. 10850
  30. 50
  31. 10.2
  32. 24200
  33. 90.9
  34. 70
  35. 50
  36. 40
  37. 800
  38. 45000
  39. 97000
  40. 12000

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