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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 416 · 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 5/6 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  2. 2.A bottle has 1/2 litre of juice. Rohan drinks 1/7 litre. How much juice is left (in litres)? =
  3. 3.A tank is 1/2 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  4. 4.2/3 − 1/6 =
  5. 5.Kabir has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  6. 6.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? =
  7. 7.A bottle has 2/5 litre of juice. Anaya drinks 3/10 litre. How much juice is left (in litres)? =
  8. 8.1/2 − 2/5 =
  9. 9.Anaya has a ribbon 7/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  10. 10.5/8 − 1/2 =
  11. 11.A bottle has 3/10 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  12. 12.A bottle has 2/3 litre of juice. Kabir drinks 2/9 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 2/3 litre of juice. Anaya drinks 1/9 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 1/3 litre of juice. Kabir drinks 1/8 litre. How much juice is left (in litres)? =
  15. 15.2/3 − 5/9 =
  16. 16.A tank is 5/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  17. 17.Diya has a ribbon 5/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  18. 18.8/9 − 1/6 =
  19. 19.4/5 − 7/10 =
  20. 20.Rohan has a ribbon 3/4 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  21. 21.1/2 − 1/7 =
  22. 22.A bottle has 2/3 litre of juice. Riya drinks 1/9 litre. How much juice is left (in litres)? =
  23. 23.Kabir has a ribbon 7/10 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  24. 24.4/5 − 1/4 =
  25. 25.1/4 − 1/8 =
  26. 26.A bottle has 8/9 litre of juice. Sara drinks 2/3 litre. How much juice is left (in litres)? =
  27. 27.3/4 − 3/8 =
  28. 28.Ishaan has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  29. 29.Vihaan has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  30. 30.5/6 − 7/9 =
  31. 31.Anaya has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  32. 32.3/7 − 1/4 =
  33. 33.Meera has a ribbon 5/6 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  34. 34.A tank is 3/4 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  35. 35.A bottle has 1/5 litre of juice. Rohan drinks 1/10 litre. How much juice is left (in litres)? =
  36. 36.A tank is 3/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  37. 37.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? =
  38. 38.A bottle has 1/6 litre of juice. Sara drinks 1/10 litre. How much juice is left (in litres)? =
  39. 39.2/3 − 4/7 =
  40. 40.Rohan has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =

Answer key

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

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