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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 855 · 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 9/10 litre of juice. Ishaan drinks 3/4 litre. How much juice is left (in litres)? =
  2. 2.2/3 − 4/9 =
  3. 3.Vihaan has a ribbon 3/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  4. 4.1/2 − 2/7 =
  5. 5.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? =
  6. 6.5/6 − 2/9 =
  7. 7.Rohan has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  8. 8.A tank is 4/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  9. 9.A bottle has 9/10 litre of juice. Diya drinks 1/5 litre. How much juice is left (in litres)? =
  10. 10.A bottle has 3/5 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  11. 11.A tank is 4/5 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  12. 12.3/7 − 1/4 =
  13. 13.4/5 − 2/3 =
  14. 14.7/8 − 1/3 =
  15. 15.5/6 − 1/5 =
  16. 16.A tank is 5/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  17. 17.1/3 − 2/9 =
  18. 18.Kabir has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  19. 19.A bottle has 3/4 litre of juice. Diya drinks 3/8 litre. How much juice is left (in litres)? =
  20. 20.1/2 − 4/9 =
  21. 21.A bottle has 5/6 litre of juice. Riya drinks 2/9 litre. How much juice is left (in litres)? =
  22. 22.9/10 − 1/4 =
  23. 23.8/9 − 1/6 =
  24. 24.5/7 − 1/3 =
  25. 25.A tank is 5/6 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  26. 26.Sara has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  27. 27.7/10 − 2/5 =
  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. 29.3/8 − 1/6 =
  30. 30.Rohan has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  31. 31.5/8 − 1/4 =
  32. 32.1/4 − 1/8 =
  33. 33.Ishaan has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  34. 34.1/3 − 1/5 =
  35. 35.Meera has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  36. 36.A bottle has 1/3 litre of juice. Sara drinks 2/7 litre. How much juice is left (in litres)? =
  37. 37.A tank is 5/6 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 5/7 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  39. 39.Anaya has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  40. 40.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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