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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 352 · 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.Aarav has a ribbon 5/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  2. 2.6/7 − 1/3 =
  3. 3.2/9 − 1/6 =
  4. 4.2/3 − 2/7 =
  5. 5.2/3 − 3/5 =
  6. 6.A bottle has 2/3 litre of juice. Arjun drinks 1/8 litre. How much juice is left (in litres)? =
  7. 7.A bottle has 7/10 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  8. 8.Aarav has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  9. 9.7/10 − 1/6 =
  10. 10.Anaya has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  11. 11.A tank is 2/3 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  12. 12.Riya has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  13. 13.1/2 − 1/3 =
  14. 14.Meera has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  15. 15.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  16. 16.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? =
  17. 17.2/3 − 5/9 =
  18. 18.Kabir has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  19. 19.A bottle has 2/9 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  20. 20.7/10 − 1/3 =
  21. 21.1/3 − 2/9 =
  22. 22.8/9 − 1/6 =
  23. 23.Ishaan has a ribbon 3/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  24. 24.Rohan has a ribbon 5/6 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  25. 25.8/9 − 1/3 =
  26. 26.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  27. 27.A bottle has 8/9 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  28. 28.1/3 − 1/7 =
  29. 29.A bottle has 1/2 litre of juice. Arjun drinks 3/7 litre. How much juice is left (in litres)? =
  30. 30.A tank is 1/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  31. 31.A tank is 1/2 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  32. 32.A bottle has 3/5 litre of juice. Kabir drinks 3/10 litre. How much juice is left (in litres)? =
  33. 33.2/3 − 2/9 =
  34. 34.5/7 − 2/3 =
  35. 35.A tank is 3/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  36. 36.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  37. 37.A tank is 1/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  38. 38.1/2 − 1/7 =
  39. 39.A tank is 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  40. 40.A bottle has 2/3 litre of juice. Meera drinks 2/9 litre. How much juice is left (in litres)? =

Answer key

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

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