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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 25 · 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. 1.1/3 − 3/10 =
  2. 2.Tara has a ribbon 1/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 5/9 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  4. 4.A tank is 1/2 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  5. 5.7/10 − 1/2 =
  6. 6.5/6 − 3/8 =
  7. 7.1/4 − 1/8 =
  8. 8.Sara has a ribbon 7/8 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  9. 9.1/3 − 2/7 =
  10. 10.A bottle has 2/3 litre of juice. Ishaan drinks 3/7 litre. How much juice is left (in litres)? =
  11. 11.5/7 − 1/3 =
  12. 12.Rohan has a ribbon 9/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  13. 13.A bottle has 5/9 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  14. 14.A tank is 1/2 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  15. 15.9/10 − 1/2 =
  16. 16.4/5 − 2/3 =
  17. 17.2/3 − 2/9 =
  18. 18.5/6 − 1/9 =
  19. 19.A bottle has 5/6 litre of juice. Diya drinks 4/9 litre. How much juice is left (in litres)? =
  20. 20.3/4 − 2/5 =
  21. 21.A bottle has 8/9 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  22. 22.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? =
  23. 23.1/2 − 1/3 =
  24. 24.A bottle has 7/9 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 3/4 litre of juice. Kabir drinks 2/5 litre. How much juice is left (in litres)? =
  26. 26.A tank is 5/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  27. 27.A bottle has 2/5 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  28. 28.Aarav has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  29. 29.Anaya has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  30. 30.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 4/5 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 3/4 litre of juice. Kabir drinks 7/10 litre. How much juice is left (in litres)? =
  33. 33.A tank is 5/6 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  34. 34.A bottle has 5/8 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  35. 35.4/9 − 1/3 =
  36. 36.Arjun has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 3/4 litre of juice. Rohan drinks 3/10 litre. How much juice is left (in litres)? =
  38. 38.3/4 − 1/2 =
  39. 39.A bottle has 3/10 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  40. 40.Riya has a ribbon 3/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =

Answer key

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

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