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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 532 · 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.Tara has a ribbon 4/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  2. 2.3/10 − 1/4 =
  3. 3.1/4 − 1/5 =
  4. 4.3/8 − 1/3 =
  5. 5.Diya has a ribbon 9/10 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  6. 6.A tank is 9/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  7. 7.5/6 − 1/5 =
  8. 8.9/10 − 5/6 =
  9. 9.A tank is 1/2 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  10. 10.7/9 − 1/2 =
  11. 11.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? =
  12. 12.A tank is 5/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  13. 13.A bottle has 5/6 litre of juice. Aarav drinks 5/9 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 1/4 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  15. 15.Aarav has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  16. 16.5/6 − 7/9 =
  17. 17.Meera has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  18. 18.Ishaan has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  19. 19.2/3 − 3/8 =
  20. 20.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? =
  21. 21.A bottle has 5/8 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  22. 22.A tank is 5/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  23. 23.2/3 − 2/7 =
  24. 24.A bottle has 2/3 litre of juice. Tara drinks 4/9 litre. How much juice is left (in litres)? =
  25. 25.Ishaan has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  26. 26.Sara has a ribbon 5/6 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  27. 27.3/4 − 3/10 =
  28. 28.4/5 − 1/10 =
  29. 29.A bottle has 5/6 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  30. 30.1/2 − 2/7 =
  31. 31.Anaya has a ribbon 5/6 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  32. 32.Kabir has a ribbon 7/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  33. 33.5/6 − 1/8 =
  34. 34.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? =
  35. 35.3/4 − 1/7 =
  36. 36.A bottle has 6/7 litre of juice. Riya drinks 2/3 litre. How much juice is left (in litres)? =
  37. 37.5/7 − 1/2 =
  38. 38.Aarav has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  39. 39.Arjun has a ribbon 5/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  40. 40.3/8 − 1/4 =

Answer key

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

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