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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 917 · 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 11301 to the nearest thousand.
  2. 2.Round 11696 to the nearest ten.
  3. 3.Round 17.66 to one decimal place. =
  4. 4.Which is closest to 803 × 49? (Round each number first.) (a) 4000 (b) 80000 (c) 40000 (d) 400000
  5. 5.Which is closest to 2396 ÷ 39? (a) 30 (b) 120 (c) 60 (d) 600
  6. 6.Round 37871 to the nearest ten.
  7. 7.Which is closest to 403 + 801 + 199? (a) 1500 (b) 1300 (c) 1400 (d) 1600
  8. 8.Round 50.43 to one decimal place. =
  9. 9.Round 58.37 to one decimal place. =
  10. 10.Round 23.44 to one decimal place. =
  11. 11.Which is closest to 801 ÷ 39? (a) 200 (b) 20 (c) 40 (d) 10
  12. 12.Round 24045 to the nearest thousand.
  13. 13.Which is closest to 303 + 99 + 101? (a) 400 (b) 700 (c) 500 (d) 600
  14. 14.Round 24.53 to one decimal place. =
  15. 15.Which is closest to 201 + 196 + 199? (a) 600 (b) 700 (c) 800 (d) 500
  16. 16.Which is closest to 2497 ÷ 51? (a) 500 (b) 100 (c) 50 (d) 25
  17. 17.Which is closest to 3607 ÷ 41? (a) 45 (b) 900 (c) 180 (d) 90
  18. 18.Round 19848 to the nearest ten.
  19. 19.Which is closest to 499 × 78? (Round each number first.) (a) 80000 (b) 400000 (c) 4000 (d) 40000
  20. 20.Round 74042 to the nearest ten.
  21. 21.Which is closest to 2403 ÷ 31? (a) 800 (b) 40 (c) 80 (d) 160
  22. 22.Which is closest to 1598 ÷ 39? (a) 20 (b) 80 (c) 40 (d) 400
  23. 23.Which is closest to 1506 ÷ 49? (a) 300 (b) 60 (c) 30 (d) 15
  24. 24.Which is closest to 301 × 59? (Round each number first.) (a) 180000 (b) 1800 (c) 36000 (d) 18000
  25. 25.Which is closest to 397 × 59? (Round each number first.) (a) 24000 (b) 2400 (c) 240000 (d) 48000
  26. 26.Round 34908 to the nearest ten.
  27. 27.Which is closest to 991 ÷ 49? (a) 200 (b) 40 (c) 10 (d) 20
  28. 28.Round 51263 to the nearest ten.
  29. 29.Which is closest to 2794 ÷ 39? (a) 70 (b) 140 (c) 35 (d) 700
  30. 30.Which is closest to 1502 ÷ 31? (a) 100 (b) 25 (c) 50 (d) 500
  31. 31.Round 14683 to the nearest ten.
  32. 32.Which is closest to 901 × 82? (Round each number first.) (a) 144000 (b) 72000 (c) 720000 (d) 7200
  33. 33.Round 47.37 to one decimal place. =
  34. 34.Which is closest to 801 ÷ 19? (a) 80 (b) 20 (c) 40 (d) 400
  35. 35.Which is closest to 599 ÷ 21? (a) 60 (b) 15 (c) 300 (d) 30
  36. 36.Which is closest to 3594 ÷ 39? (a) 180 (b) 900 (c) 90 (d) 45
  37. 37.Round 18012 to the nearest hundred.
  38. 38.Round 44277 to the nearest ten.
  39. 39.Which is closest to 1199 ÷ 21? (a) 30 (b) 120 (c) 600 (d) 60
  40. 40.Round 25170 to the nearest thousand.

Answer key

  1. 11000
  2. 11700
  3. 17.7
  4. 40000
  5. 60
  6. 37870
  7. 1400
  8. 50.4
  9. 58.4
  10. 23.4
  11. 20
  12. 24000
  13. 500
  14. 24.5
  15. 600
  16. 50
  17. 90
  18. 19850
  19. 40000
  20. 74040
  21. 80
  22. 40
  23. 30
  24. 18000
  25. 24000
  26. 34910
  27. 20
  28. 51260
  29. 70
  30. 50
  31. 14680
  32. 72000
  33. 47.4
  34. 40
  35. 30
  36. 90
  37. 18000
  38. 44280
  39. 60
  40. 25000

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