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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 328 · 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 5/6 litre of juice. Rohan drinks 1/5 litre. How much juice is left (in litres)? =
  2. 2.2/3 − 3/5 =
  3. 3.5/6 − 1/10 =
  4. 4.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? =
  5. 5.A tank is 2/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  6. 6.Ishaan has a ribbon 9/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  7. 7.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  8. 8.5/6 − 2/5 =
  9. 9.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  10. 10.A bottle has 6/7 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  11. 11.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? =
  12. 12.5/9 − 1/2 =
  13. 13.1/3 − 2/9 =
  14. 14.1/4 − 1/7 =
  15. 15.A bottle has 7/8 litre of juice. Riya drinks 3/4 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 5/6 litre of juice. Meera drinks 3/5 litre. How much juice is left (in litres)? =
  17. 17.2/3 − 1/7 =
  18. 18.Sara has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  19. 19.A tank is 1/2 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  20. 20.3/10 − 1/5 =
  21. 21.Rohan has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  22. 22.3/4 − 1/7 =
  23. 23.2/3 − 1/8 =
  24. 24.3/4 − 5/8 =
  25. 25.1/2 − 1/10 =
  26. 26.2/7 − 1/4 =
  27. 27.8/9 − 1/3 =
  28. 28.A bottle has 2/3 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  29. 29.A bottle has 3/4 litre of juice. Aarav drinks 3/5 litre. How much juice is left (in litres)? =
  30. 30.1/2 − 2/9 =
  31. 31.7/8 − 2/3 =
  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. 33.7/8 − 1/3 =
  34. 34.2/3 − 3/7 =
  35. 35.Anaya has a ribbon 5/6 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  36. 36.7/10 − 3/5 =
  37. 37.4/5 − 2/3 =
  38. 38.Riya has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  39. 39.A tank is 2/3 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  40. 40.4/5 − 1/6 =

Answer key

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

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