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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 356 · 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 95 + 102 + 95? (a) 500 (b) 400 (c) 200 (d) 300
  2. 2.Round 25487 to the nearest ten.
  3. 3.Which is closest to 1795 ÷ 29? (a) 120 (b) 600 (c) 30 (d) 60
  4. 4.Round 16.67 to one decimal place. =
  5. 5.Which is closest to 799 × 48? (Round each number first.) (a) 4000 (b) 40000 (c) 80000 (d) 400000
  6. 6.Which is closest to 1004 ÷ 19? (a) 500 (b) 100 (c) 50 (d) 25
  7. 7.Which is closest to 1594 ÷ 19? (a) 80 (b) 40 (c) 160 (d) 800
  8. 8.Round 96.28 to one decimal place. =
  9. 9.Which is closest to 496 + 298 + 901? (a) 1800 (b) 1700 (c) 1900 (d) 1600
  10. 10.Which is closest to 399 + 101 + 899? (a) 1500 (b) 1400 (c) 1600 (d) 1300
  11. 11.Which is closest to 2495 ÷ 51? (a) 25 (b) 100 (c) 50 (d) 500
  12. 12.Round 56204 to the nearest thousand.
  13. 13.Which is closest to 99 + 701 + 495? (a) 1300 (b) 1400 (c) 1500 (d) 1200
  14. 14.Which is closest to 102 + 103 + 104? (a) 300 (b) 400 (c) 200 (d) 500
  15. 15.Round 19196 to the nearest hundred.
  16. 16.Which is closest to 296 × 19? (Round each number first.) (a) 600 (b) 12000 (c) 60000 (d) 6000
  17. 17.Which is closest to 396 × 48? (Round each number first.) (a) 200000 (b) 20000 (c) 40000 (d) 2000
  18. 18.Round 17.42 to one decimal place. =
  19. 19.Which is closest to 592 ÷ 21? (a) 60 (b) 300 (c) 15 (d) 30
  20. 20.Which is closest to 504 × 48? (Round each number first.) (a) 25000 (b) 50000 (c) 2500 (d) 250000
  21. 21.Which is closest to 592 ÷ 19? (a) 300 (b) 30 (c) 15 (d) 60
  22. 22.Round 93.62 to one decimal place. =
  23. 23.Which is closest to 1508 ÷ 29? (a) 50 (b) 25 (c) 100 (d) 500
  24. 24.Round 29354 to the nearest thousand.
  25. 25.Which is closest to 1992 ÷ 41? (a) 500 (b) 100 (c) 50 (d) 25
  26. 26.Which is closest to 200 + 297 + 97? (a) 700 (b) 500 (c) 800 (d) 600
  27. 27.Round 54.64 to one decimal place. =
  28. 28.Round 58.36 to one decimal place. =
  29. 29.Round 9981 to the nearest thousand.
  30. 30.Which is closest to 4004 ÷ 49? (a) 40 (b) 160 (c) 800 (d) 80
  31. 31.Round 95899 to the nearest thousand.
  32. 32.Which is closest to 496 + 301 + 95? (a) 1100 (b) 900 (c) 800 (d) 1000
  33. 33.Which is closest to 303 × 69? (Round each number first.) (a) 42000 (b) 210000 (c) 21000 (d) 2100
  34. 34.Round 34.17 to one decimal place. =
  35. 35.Round 39013 to the nearest hundred.
  36. 36.Which is closest to 3208 ÷ 41? (a) 80 (b) 160 (c) 800 (d) 40
  37. 37.Round 66.66 to one decimal place. =
  38. 38.Which is closest to 397 × 59? (Round each number first.) (a) 24000 (b) 2400 (c) 240000 (d) 48000
  39. 39.Which is closest to 195 + 203 + 899? (a) 1200 (b) 1400 (c) 1500 (d) 1300
  40. 40.Which is closest to 400 + 696 + 105? (a) 1300 (b) 1200 (c) 1100 (d) 1400

Answer key

  1. 300
  2. 25490
  3. 60
  4. 16.7
  5. 40000
  6. 50
  7. 80
  8. 96.3
  9. 1700
  10. 1400
  11. 50
  12. 56000
  13. 1300
  14. 300
  15. 19200
  16. 6000
  17. 20000
  18. 17.4
  19. 30
  20. 25000
  21. 30
  22. 93.6
  23. 50
  24. 29000
  25. 50
  26. 600
  27. 54.6
  28. 58.4
  29. 10000
  30. 80
  31. 96000
  32. 900
  33. 21000
  34. 34.2
  35. 39000
  36. 80
  37. 66.7
  38. 24000
  39. 1300
  40. 1200

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