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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 864 · 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 5/9 of the tank is used. What fraction of the tank is full now? =
  2. 2.2/5 − 1/10 =
  3. 3.A bottle has 3/4 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 9/10 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  5. 5.4/7 − 1/2 =
  6. 6.A tank is 2/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  7. 7.Arjun has a ribbon 5/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  8. 8.Diya has a ribbon 5/6 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  9. 9.5/6 − 1/8 =
  10. 10.4/7 − 1/4 =
  11. 11.3/4 − 1/8 =
  12. 12.7/10 − 3/5 =
  13. 13.3/4 − 1/7 =
  14. 14.Rohan has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  15. 15.A tank is 8/9 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  16. 16.6/7 − 1/2 =
  17. 17.2/3 − 3/5 =
  18. 18.1/2 − 2/7 =
  19. 19.3/4 − 1/2 =
  20. 20.3/5 − 1/6 =
  21. 21.1/4 − 1/6 =
  22. 22.A bottle has 2/3 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  23. 23.8/9 − 1/6 =
  24. 24.A bottle has 1/2 litre of juice. Arjun drinks 3/10 litre. How much juice is left (in litres)? =
  25. 25.1/4 − 1/5 =
  26. 26.A tank is 5/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  27. 27.Diya has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  28. 28.2/3 − 1/8 =
  29. 29.A bottle has 1/2 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  30. 30.Anaya has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  31. 31.1/2 − 1/10 =
  32. 32.A tank is 6/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  33. 33.1/3 − 1/4 =
  34. 34.1/3 − 1/5 =
  35. 35.Rohan has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  36. 36.1/4 − 1/8 =
  37. 37.1/6 − 1/10 =
  38. 38.9/10 − 1/4 =
  39. 39.A bottle has 3/8 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  40. 40.3/10 − 1/4 =

Answer key

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

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