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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 387 · 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. 1.1/5 − 1/6 =
  2. 2.A tank is 1/2 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  3. 3.Tara has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  4. 4.Rohan has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  5. 5.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  6. 6.Rohan has a ribbon 5/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  7. 7.3/7 − 1/4 =
  8. 8.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  9. 9.A tank is 2/3 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  10. 10.Anaya has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  11. 11.6/7 − 1/4 =
  12. 12.5/6 − 1/9 =
  13. 13.A tank is 5/6 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  14. 14.A bottle has 5/6 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  15. 15.2/3 − 1/9 =
  16. 16.Arjun has a ribbon 1/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 4/5 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.9/10 − 1/3 =
  19. 19.A tank is 2/3 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  20. 20.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  21. 21.1/2 − 2/9 =
  22. 22.A bottle has 1/3 litre of juice. Arjun drinks 1/7 litre. How much juice is left (in litres)? =
  23. 23.5/9 − 1/3 =
  24. 24.A tank is 3/4 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  25. 25.2/3 − 2/9 =
  26. 26.2/5 − 3/10 =
  27. 27.1/3 − 1/10 =
  28. 28.A bottle has 4/9 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  29. 29.A bottle has 1/2 litre of juice. Tara drinks 2/7 litre. How much juice is left (in litres)? =
  30. 30.A bottle has 6/7 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.5/6 − 1/8 =
  32. 32.Meera has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  33. 33.A tank is 5/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  34. 34.A tank is 7/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  35. 35.1/3 − 2/7 =
  36. 36.A tank is 3/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  37. 37.A bottle has 1/2 litre of juice. Sara drinks 1/9 litre. How much juice is left (in litres)? =
  38. 38.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  39. 39.3/10 − 1/5 =
  40. 40.A bottle has 3/4 litre of juice. Riya drinks 3/8 litre. How much juice is left (in litres)? =

Answer key

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

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