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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 193 · 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 tank is 2/3 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  2. 2.5/8 − 1/3 =
  3. 3.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  4. 4.9/10 − 1/6 =
  5. 5.3/5 − 1/6 =
  6. 6.A bottle has 7/8 litre of juice. Riya drinks 5/6 litre. How much juice is left (in litres)? =
  7. 7.5/6 − 3/8 =
  8. 8.2/3 − 2/9 =
  9. 9.5/6 − 2/9 =
  10. 10.7/8 − 5/6 =
  11. 11.A bottle has 3/5 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  12. 12.1/2 − 1/7 =
  13. 13.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? =
  14. 14.4/5 − 1/4 =
  15. 15.A bottle has 7/10 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  16. 16.3/10 − 1/5 =
  17. 17.1/2 − 3/10 =
  18. 18.5/7 − 1/4 =
  19. 19.7/10 − 1/3 =
  20. 20.A bottle has 6/7 litre of juice. Sara drinks 2/3 litre. How much juice is left (in litres)? =
  21. 21.4/5 − 2/3 =
  22. 22.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? =
  23. 23.A bottle has 5/6 litre of juice. Rohan drinks 7/9 litre. How much juice is left (in litres)? =
  24. 24.Kabir has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  25. 25.A bottle has 5/6 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  26. 26.8/9 − 1/2 =
  27. 27.A bottle has 1/2 litre of juice. Arjun drinks 1/10 litre. How much juice is left (in litres)? =
  28. 28.Meera has a ribbon 1/3 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  29. 29.7/9 − 1/2 =
  30. 30.A bottle has 9/10 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  31. 31.7/8 − 1/3 =
  32. 32.Riya has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  33. 33.Diya has a ribbon 5/6 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  34. 34.2/5 − 3/10 =
  35. 35.7/10 − 1/4 =
  36. 36.7/9 − 1/3 =
  37. 37.Riya has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  38. 38.Kabir has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 5/6 litre of juice. Tara drinks 3/8 litre. How much juice is left (in litres)? =
  40. 40.Anaya has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =

Answer key

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

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