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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 370 · 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.A bottle has 5/6 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  2. 2.A tank is 7/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  3. 3.3/4 − 2/3 =
  4. 4.3/8 − 1/3 =
  5. 5.7/9 − 1/6 =
  6. 6.2/5 − 1/4 =
  7. 7.Riya has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  8. 8.A tank is 1/4 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  9. 9.A bottle has 5/6 litre of juice. Sara drinks 4/9 litre. How much juice is left (in litres)? =
  10. 10.5/6 − 1/10 =
  11. 11.A bottle has 1/2 litre of juice. Rohan drinks 1/9 litre. How much juice is left (in litres)? =
  12. 12.3/5 − 1/6 =
  13. 13.A bottle has 5/8 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 1/4 litre of juice. Riya drinks 1/5 litre. How much juice is left (in litres)? =
  15. 15.3/5 − 3/10 =
  16. 16.Riya has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  17. 17.1/2 − 1/10 =
  18. 18.5/6 − 1/9 =
  19. 19.Aarav has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  20. 20.A tank is 2/3 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  21. 21.Riya has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 2/3 litre of juice. Anaya drinks 1/5 litre. How much juice is left (in litres)? =
  23. 23.Diya has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  24. 24.Meera has a ribbon 5/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  25. 25.3/5 − 1/10 =
  26. 26.4/9 − 1/6 =
  27. 27.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? =
  28. 28.A tank is 1/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  29. 29.Diya has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  30. 30.A tank is 9/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  31. 31.5/9 − 1/2 =
  32. 32.A tank is 9/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  33. 33.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? =
  34. 34.A tank is 4/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  35. 35.4/5 − 7/10 =
  36. 36.1/4 − 1/7 =
  37. 37.Riya has a ribbon 1/2 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  38. 38.8/9 − 1/2 =
  39. 39.A tank is 3/4 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  40. 40.A bottle has 5/8 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =

Answer key

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

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