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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 863 · 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. Riya drinks 2/5 litre. How much juice is left (in litres)? =
  2. 2.Riya has a ribbon 5/6 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  3. 3.Sara has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  4. 4.5/6 − 2/5 =
  5. 5.1/3 − 1/10 =
  6. 6.5/6 − 4/9 =
  7. 7.1/4 − 1/5 =
  8. 8.A bottle has 5/6 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  9. 9.Diya has a ribbon 9/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  10. 10.4/5 − 7/10 =
  11. 11.2/9 − 1/6 =
  12. 12.1/6 − 1/10 =
  13. 13.3/4 − 7/10 =
  14. 14.4/5 − 1/4 =
  15. 15.1/3 − 1/9 =
  16. 16.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  17. 17.A tank is 5/6 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  18. 18.3/4 − 2/5 =
  19. 19.A bottle has 5/6 litre of juice. Tara drinks 4/5 litre. How much juice is left (in litres)? =
  20. 20.A tank is 7/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  21. 21.1/2 − 1/10 =
  22. 22.7/8 − 1/4 =
  23. 23.A bottle has 7/10 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  24. 24.A bottle has 3/10 litre of juice. Diya drinks 1/5 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 9/10 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  26. 26.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  27. 27.4/7 − 1/2 =
  28. 28.A bottle has 7/8 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  29. 29.9/10 − 1/5 =
  30. 30.Kabir has a ribbon 1/2 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  31. 31.Riya has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  32. 32.1/2 − 1/4 =
  33. 33.9/10 − 3/4 =
  34. 34.Tara has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  35. 35.6/7 − 1/3 =
  36. 36.A tank is 7/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  37. 37.Arjun has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  38. 38.4/5 − 3/4 =
  39. 39.1/3 − 1/8 =
  40. 40.8/9 − 1/3 =

Answer key

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

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