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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 12 · 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. 1.7/9 − 2/3 =
  2. 2.A tank is 7/8 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  3. 3.A tank is 1/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  4. 4.A bottle has 7/8 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  5. 5.Arjun has a ribbon 5/6 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  6. 6.A tank is 3/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  7. 7.2/7 − 1/4 =
  8. 8.A bottle has 7/10 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 7/8 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  10. 10.A tank is 3/4 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  11. 11.5/6 − 3/5 =
  12. 12.A bottle has 2/5 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  13. 13.A tank is 5/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  14. 14.A bottle has 2/3 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  15. 15.A bottle has 5/6 litre of juice. Rohan drinks 3/8 litre. How much juice is left (in litres)? =
  16. 16.2/3 − 5/9 =
  17. 17.A bottle has 2/5 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.A bottle has 1/2 litre of juice. Diya drinks 2/9 litre. How much juice is left (in litres)? =
  19. 19.Diya has a ribbon 5/6 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  20. 20.9/10 − 1/6 =
  21. 21.A bottle has 9/10 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  22. 22.1/4 − 1/7 =
  23. 23.A bottle has 4/5 litre of juice. Aarav drinks 7/10 litre. How much juice is left (in litres)? =
  24. 24.3/8 − 1/3 =
  25. 25.3/4 − 1/2 =
  26. 26.A tank is 8/9 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  27. 27.1/3 − 1/5 =
  28. 28.A tank is 9/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  29. 29.3/4 − 2/7 =
  30. 30.A bottle has 1/3 litre of juice. Ishaan drinks 1/7 litre. How much juice is left (in litres)? =
  31. 31.4/5 − 1/6 =
  32. 32.A tank is 4/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  33. 33.4/9 − 1/3 =
  34. 34.Kabir has a ribbon 9/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  35. 35.A tank is 3/4 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  36. 36.2/5 − 3/10 =
  37. 37.A bottle has 1/2 litre of juice. Meera drinks 1/10 litre. How much juice is left (in litres)? =
  38. 38.2/5 − 1/10 =
  39. 39.A bottle has 1/6 litre of juice. Kabir drinks 1/9 litre. How much juice is left (in litres)? =
  40. 40.5/6 − 7/9 =

Answer key

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

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