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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 791 · 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 7/10 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  2. 2.9/10 − 3/5 =
  3. 3.A bottle has 9/10 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  4. 4.2/5 − 1/4 =
  5. 5.A bottle has 5/6 litre of juice. Rohan drinks 1/9 litre. How much juice is left (in litres)? =
  6. 6.Diya has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  7. 7.3/7 − 1/4 =
  8. 8.5/6 − 1/2 =
  9. 9.8/9 − 5/6 =
  10. 10.Sara has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  11. 11.7/9 − 1/6 =
  12. 12.A bottle has 3/4 litre of juice. Vihaan drinks 2/7 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 5/6 litre of juice. Arjun drinks 2/5 litre. How much juice is left (in litres)? =
  14. 14.A tank is 2/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  15. 15.2/3 − 4/9 =
  16. 16.1/4 − 1/8 =
  17. 17.Kabir has a ribbon 5/6 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  18. 18.2/3 − 1/10 =
  19. 19.Riya has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  20. 20.5/6 − 1/9 =
  21. 21.2/3 − 5/9 =
  22. 22.A bottle has 1/3 litre of juice. Rohan drinks 3/10 litre. How much juice is left (in litres)? =
  23. 23.5/7 − 1/3 =
  24. 24.1/2 − 3/8 =
  25. 25.4/5 − 3/4 =
  26. 26.1/2 − 4/9 =
  27. 27.1/2 − 3/10 =
  28. 28.A bottle has 1/4 litre of juice. Kabir drinks 1/8 litre. How much juice is left (in litres)? =
  29. 29.3/8 − 1/4 =
  30. 30.5/6 − 3/8 =
  31. 31.2/3 − 1/7 =
  32. 32.2/5 − 1/10 =
  33. 33.A bottle has 5/6 litre of juice. Arjun drinks 5/9 litre. How much juice is left (in litres)? =
  34. 34.A tank is 1/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  35. 35.Anaya has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  36. 36.A bottle has 2/3 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  37. 37.A bottle has 7/10 litre of juice. Rohan drinks 3/5 litre. How much juice is left (in litres)? =
  38. 38.2/3 − 2/5 =
  39. 39.A tank is 1/6 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  40. 40.7/10 − 2/3 =

Answer key

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

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