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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 336 · 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.Tara has a ribbon 3/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  2. 2.5/9 − 1/3 =
  3. 3.A bottle has 5/6 litre of juice. Aarav drinks 3/5 litre. How much juice is left (in litres)? =
  4. 4.5/6 − 5/9 =
  5. 5.2/7 − 1/4 =
  6. 6.A tank is 1/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  7. 7.6/7 − 1/2 =
  8. 8.9/10 − 5/6 =
  9. 9.3/4 − 2/7 =
  10. 10.Arjun has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  11. 11.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  12. 12.7/9 − 1/6 =
  13. 13.Meera has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  14. 14.A bottle has 3/10 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  15. 15.1/3 − 1/4 =
  16. 16.A bottle has 3/4 litre of juice. Sara drinks 5/8 litre. How much juice is left (in litres)? =
  17. 17.Rohan has a ribbon 4/5 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  18. 18.A bottle has 3/5 litre of juice. Diya drinks 1/10 litre. How much juice is left (in litres)? =
  19. 19.1/4 − 1/8 =
  20. 20.8/9 − 1/3 =
  21. 21.Tara has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  22. 22.1/2 − 1/7 =
  23. 23.A bottle has 8/9 litre of juice. Arjun drinks 5/6 litre. How much juice is left (in litres)? =
  24. 24.1/2 − 2/9 =
  25. 25.5/6 − 7/10 =
  26. 26.Aarav has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  27. 27.A tank is 1/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  28. 28.Aarav has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  29. 29.A bottle has 9/10 litre of juice. Rohan drinks 4/5 litre. How much juice is left (in litres)? =
  30. 30.1/2 − 1/9 =
  31. 31.8/9 − 2/3 =
  32. 32.2/5 − 1/4 =
  33. 33.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? =
  34. 34.Riya has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  35. 35.2/3 − 1/5 =
  36. 36.5/9 − 1/6 =
  37. 37.A tank is 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  38. 38.3/4 − 1/5 =
  39. 39.Kabir has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  40. 40.3/4 − 4/7 =

Answer key

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

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