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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 101 · 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 3/5 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  2. 2.3/4 − 2/5 =
  3. 3.5/9 − 1/3 =
  4. 4.1/6 − 1/10 =
  5. 5.Kabir has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  6. 6.4/9 − 1/3 =
  7. 7.A bottle has 8/9 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  8. 8.2/5 − 1/4 =
  9. 9.8/9 − 2/3 =
  10. 10.A bottle has 9/10 litre of juice. Aarav drinks 5/6 litre. How much juice is left (in litres)? =
  11. 11.2/3 − 4/7 =
  12. 12.A bottle has 5/8 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  13. 13.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  14. 14.6/7 − 1/4 =
  15. 15.A bottle has 2/3 litre of juice. Rohan drinks 3/8 litre. How much juice is left (in litres)? =
  16. 16.5/6 − 1/2 =
  17. 17.A bottle has 6/7 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  18. 18.2/7 − 1/4 =
  19. 19.A bottle has 9/10 litre of juice. Arjun drinks 3/5 litre. How much juice is left (in litres)? =
  20. 20.A bottle has 2/3 litre of juice. Tara drinks 2/7 litre. How much juice is left (in litres)? =
  21. 21.4/9 − 1/6 =
  22. 22.Anaya has a ribbon 3/4 m long and cuts off 5/7 m. How long is the ribbon now (in m)? =
  23. 23.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? =
  24. 24.1/2 − 3/7 =
  25. 25.5/9 − 1/2 =
  26. 26.Tara has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  27. 27.7/10 − 1/3 =
  28. 28.1/4 − 1/5 =
  29. 29.A bottle has 5/6 litre of juice. Riya drinks 2/9 litre. How much juice is left (in litres)? =
  30. 30.7/8 − 3/4 =
  31. 31.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? =
  32. 32.A bottle has 8/9 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  33. 33.Sara has a ribbon 3/4 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  34. 34.3/4 − 1/8 =
  35. 35.9/10 − 1/3 =
  36. 36.6/7 − 1/3 =
  37. 37.A bottle has 9/10 litre of juice. Diya drinks 2/5 litre. How much juice is left (in litres)? =
  38. 38.5/8 − 1/4 =
  39. 39.A bottle has 5/6 litre of juice. Anaya drinks 4/9 litre. How much juice is left (in litres)? =
  40. 40.Anaya has a ribbon 3/4 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =

Answer key

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

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