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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 523 · 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. 1.1/5 − 1/6 =
  2. 2.4/9 − 1/3 =
  3. 3.A tank is 5/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  4. 4.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  5. 5.3/5 − 1/2 =
  6. 6.Kabir has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  7. 7.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  8. 8.4/7 − 1/2 =
  9. 9.A bottle has 5/6 litre of juice. Meera drinks 2/5 litre. How much juice is left (in litres)? =
  10. 10.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? =
  11. 11.4/5 − 2/3 =
  12. 12.1/4 − 1/7 =
  13. 13.A tank is 7/8 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  14. 14.Aarav has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  15. 15.Tara has a ribbon 1/2 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  16. 16.A bottle has 7/8 litre of juice. Kabir drinks 3/4 litre. How much juice is left (in litres)? =
  17. 17.5/6 − 5/9 =
  18. 18.1/2 − 4/9 =
  19. 19.Arjun has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  20. 20.1/3 − 1/5 =
  21. 21.A bottle has 2/3 litre of juice. Kabir drinks 1/5 litre. How much juice is left (in litres)? =
  22. 22.2/3 − 2/9 =
  23. 23.Rohan has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  24. 24.Tara has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  25. 25.3/10 − 1/5 =
  26. 26.5/6 − 3/5 =
  27. 27.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  28. 28.Anaya has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  29. 29.Diya has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  30. 30.7/8 − 1/2 =
  31. 31.8/9 − 1/3 =
  32. 32.Arjun has a ribbon 7/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  33. 33.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? =
  34. 34.A bottle has 1/3 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =
  35. 35.A tank is 7/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  36. 36.Riya has a ribbon 5/6 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  37. 37.Tara has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  38. 38.3/4 − 1/6 =
  39. 39.8/9 − 5/6 =
  40. 40.A bottle has 5/7 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =

Answer key

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

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