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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 823 · 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 1/2 litre of juice. Rohan drinks 4/9 litre. How much juice is left (in litres)? =
  2. 2.7/10 − 1/2 =
  3. 3.5/6 − 5/9 =
  4. 4.A bottle has 2/3 litre of juice. Vihaan drinks 1/7 litre. How much juice is left (in litres)? =
  5. 5.1/3 − 2/9 =
  6. 6.2/3 − 5/9 =
  7. 7.Aarav has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  8. 8.A tank is 5/6 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  9. 9.1/4 − 1/6 =
  10. 10.3/5 − 1/4 =
  11. 11.A tank is 3/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  12. 12.A bottle has 3/4 litre of juice. Kabir drinks 1/8 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 4/5 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  14. 14.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  15. 15.Sara has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  16. 16.1/5 − 1/6 =
  17. 17.A tank is 6/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  18. 18.A bottle has 7/8 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  19. 19.9/10 − 1/6 =
  20. 20.Arjun has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  21. 21.A bottle has 2/3 litre of juice. Meera drinks 1/10 litre. How much juice is left (in litres)? =
  22. 22.Riya has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  23. 23.6/7 − 2/3 =
  24. 24.A tank is 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  25. 25.A bottle has 3/4 litre of juice. Tara drinks 3/5 litre. How much juice is left (in litres)? =
  26. 26.A bottle has 5/9 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  27. 27.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  28. 28.A tank is 2/3 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  29. 29.1/5 − 1/10 =
  30. 30.A tank is 5/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  31. 31.2/3 − 5/8 =
  32. 32.Sara has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  33. 33.2/3 − 1/4 =
  34. 34.1/2 − 2/7 =
  35. 35.Anaya has a ribbon 5/6 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  36. 36.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  37. 37.Sara has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  38. 38.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  39. 39.5/7 − 1/2 =
  40. 40.9/10 − 3/4 =

Answer key

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

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