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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 287 · 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.Kabir has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  2. 2.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  3. 3.1/2 − 1/3 =
  4. 4.A bottle has 7/8 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  5. 5.Arjun has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  6. 6.A bottle has 4/5 litre of juice. Riya drinks 2/3 litre. How much juice is left (in litres)? =
  7. 7.5/6 − 3/8 =
  8. 8.3/5 − 3/10 =
  9. 9.A bottle has 8/9 litre of juice. Ishaan drinks 5/6 litre. How much juice is left (in litres)? =
  10. 10.4/5 − 2/3 =
  11. 11.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  12. 12.2/5 − 1/10 =
  13. 13.A bottle has 9/10 litre of juice. Vihaan drinks 1/5 litre. How much juice is left (in litres)? =
  14. 14.3/5 − 1/3 =
  15. 15.Meera has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  16. 16.A bottle has 7/8 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  17. 17.2/3 − 4/7 =
  18. 18.1/2 − 4/9 =
  19. 19.A bottle has 1/2 litre of juice. Tara drinks 3/8 litre. How much juice is left (in litres)? =
  20. 20.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? =
  21. 21.A bottle has 1/2 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  22. 22.5/6 − 1/10 =
  23. 23.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  24. 24.A bottle has 7/8 litre of juice. Arjun drinks 5/6 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 3/4 litre of juice. Diya drinks 2/7 litre. How much juice is left (in litres)? =
  26. 26.A bottle has 1/6 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  27. 27.Sara has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  28. 28.5/6 − 7/9 =
  29. 29.5/6 − 3/10 =
  30. 30.Anaya has a ribbon 3/4 m long and cuts off 5/7 m. How long is the ribbon now (in m)? =
  31. 31.5/6 − 1/8 =
  32. 32.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? =
  33. 33.3/4 − 3/8 =
  34. 34.8/9 − 5/6 =
  35. 35.A tank is 3/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  36. 36.A bottle has 5/6 litre of juice. Vihaan drinks 4/5 litre. How much juice is left (in litres)? =
  37. 37.5/6 − 4/5 =
  38. 38.2/3 − 3/5 =
  39. 39.7/9 − 2/3 =
  40. 40.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? =

Answer key

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

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