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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 304 · 40 questions
TalentJR

The method (LCM, then take away): Find the LCM of the two bottom numbers. Change each fraction to that bottom number. Subtract the tops, keep the bottom, and simplify.

NameDateTime takenScore ___ / 40
  1. 1.3/4 − 2/7 =
  2. 2.5/9 − 1/3 =
  3. 3.2/5 − 1/4 =
  4. 4.7/10 − 2/5 =
  5. 5.1/3 − 1/4 =
  6. 6.A tank is 5/6 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  7. 7.3/8 − 1/3 =
  8. 8.1/2 − 1/9 =
  9. 9.1/2 − 1/5 =
  10. 10.7/9 − 1/3 =
  11. 11.A tank is 7/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  12. 12.5/6 − 2/9 =
  13. 13.1/2 − 1/3 =
  14. 14.Tara has a ribbon 5/6 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  15. 15.1/3 − 1/5 =
  16. 16.7/8 − 1/3 =
  17. 17.2/5 − 1/10 =
  18. 18.1/2 − 2/5 =
  19. 19.2/3 − 1/9 =
  20. 20.3/8 − 1/4 =
  21. 21.A bottle has 6/7 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  22. 22.A tank is 6/7 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  23. 23.2/3 − 3/7 =
  24. 24.3/4 − 1/3 =
  25. 25.2/3 − 1/2 =
  26. 26.6/7 − 1/4 =
  27. 27.2/3 − 3/5 =
  28. 28.Diya has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  29. 29.A bottle has 1/2 litre of juice. Anaya drinks 1/8 litre. How much juice is left (in litres)? =
  30. 30.3/7 − 1/4 =
  31. 31.5/6 − 3/8 =
  32. 32.A tank is 3/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  33. 33.1/2 − 4/9 =
  34. 34.2/5 − 1/6 =
  35. 35.2/3 − 1/8 =
  36. 36.Rohan has a ribbon 3/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  37. 37.2/3 − 2/5 =
  38. 38.3/10 − 1/5 =
  39. 39.2/7 − 1/4 =
  40. 40.8/9 − 1/6 =

Answer key

  1. 13/28
  2. 2/9
  3. 3/20
  4. 3/10
  5. 1/12
  6. 11/18
  7. 1/24
  8. 7/18
  9. 3/10
  10. 4/9
  11. 4/9
  12. 11/18
  13. 1/6
  14. 7/30
  15. 2/15
  16. 13/24
  17. 3/10
  18. 1/10
  19. 5/9
  20. 1/8
  21. 5/14
  22. 3/28
  23. 5/21
  24. 5/12
  25. 1/6
  26. 17/28
  27. 1/15
  28. 1/14
  29. 3/8
  30. 5/28
  31. 11/24
  32. 1/10
  33. 1/18
  34. 7/30
  35. 13/24
  36. 11/20
  37. 4/15
  38. 1/10
  39. 1/28
  40. 13/18

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