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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 737 · 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 2/3 litre of juice. Vihaan drinks 5/9 litre. How much juice is left (in litres)? =
  2. 2.A tank is 6/7 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  3. 3.2/3 − 3/5 =
  4. 4.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  5. 5.Kabir has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  6. 6.A bottle has 5/6 litre of juice. Kabir drinks 3/8 litre. How much juice is left (in litres)? =
  7. 7.5/8 − 1/3 =
  8. 8.Diya has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  9. 9.Anaya has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  10. 10.A bottle has 2/9 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  11. 11.Rohan has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  12. 12.3/4 − 3/7 =
  13. 13.2/3 − 1/7 =
  14. 14.7/10 − 3/5 =
  15. 15.2/3 − 1/9 =
  16. 16.A bottle has 2/7 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  17. 17.Arjun has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  18. 18.7/10 − 1/4 =
  19. 19.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? =
  20. 20.Diya has a ribbon 9/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  21. 21.5/7 − 1/3 =
  22. 22.Rohan has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  23. 23.Rohan has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  24. 24.6/7 − 3/4 =
  25. 25.8/9 − 1/3 =
  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. 27.5/6 − 3/4 =
  28. 28.4/5 − 1/4 =
  29. 29.7/10 − 2/3 =
  30. 30.2/9 − 1/6 =
  31. 31.4/5 − 1/6 =
  32. 32.5/7 − 1/2 =
  33. 33.3/5 − 1/10 =
  34. 34.7/8 − 2/3 =
  35. 35.7/8 − 1/2 =
  36. 36.5/7 − 1/4 =
  37. 37.A bottle has 7/8 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  38. 38.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  39. 39.A tank is 3/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  40. 40.9/10 − 2/3 =

Answer key

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

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