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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 242 · 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.Sara has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  2. 2.5/6 − 2/9 =
  3. 3.Diya has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  4. 4.3/4 − 1/7 =
  5. 5.5/8 − 1/2 =
  6. 6.7/10 − 1/6 =
  7. 7.A bottle has 7/8 litre of juice. Aarav drinks 3/4 litre. How much juice is left (in litres)? =
  8. 8.A bottle has 2/5 litre of juice. Riya drinks 1/10 litre. How much juice is left (in litres)? =
  9. 9.5/6 − 7/9 =
  10. 10.A bottle has 3/5 litre of juice. Riya drinks 3/10 litre. How much juice is left (in litres)? =
  11. 11.2/5 − 1/3 =
  12. 12.7/8 − 1/2 =
  13. 13.5/6 − 1/5 =
  14. 14.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? =
  15. 15.8/9 − 2/3 =
  16. 16.A bottle has 1/3 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  17. 17.A tank is 5/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  18. 18.A bottle has 8/9 litre of juice. Rohan drinks 5/6 litre. How much juice is left (in litres)? =
  19. 19.A tank is 1/2 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  20. 20.A tank is 4/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  21. 21.8/9 − 1/6 =
  22. 22.7/9 − 1/6 =
  23. 23.1/3 − 1/6 =
  24. 24.Meera has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  25. 25.1/2 − 1/8 =
  26. 26.7/10 − 3/5 =
  27. 27.5/6 − 3/4 =
  28. 28.1/5 − 1/10 =
  29. 29.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  30. 30.Rohan has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  31. 31.8/9 − 5/6 =
  32. 32.Aarav has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  33. 33.5/9 − 1/2 =
  34. 34.A tank is 9/10 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  35. 35.4/5 − 1/6 =
  36. 36.3/4 − 4/7 =
  37. 37.A bottle has 4/7 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  38. 38.2/3 − 5/9 =
  39. 39.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  40. 40.A tank is 9/10 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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