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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 21 · 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 3/4 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  2. 2.Kabir has a ribbon 7/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  3. 3.2/5 − 1/10 =
  4. 4.7/10 − 2/3 =
  5. 5.8/9 − 5/6 =
  6. 6.3/10 − 1/6 =
  7. 7.Meera has a ribbon 1/2 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  8. 8.9/10 − 1/5 =
  9. 9.A bottle has 2/3 litre of juice. Arjun drinks 5/9 litre. How much juice is left (in litres)? =
  10. 10.A bottle has 2/3 litre of juice. Anaya drinks 3/7 litre. How much juice is left (in litres)? =
  11. 11.Riya has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  12. 12.A tank is 7/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  13. 13.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  14. 14.Riya has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  15. 15.Aarav has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  16. 16.1/2 − 3/7 =
  17. 17.Aarav has a ribbon 5/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  18. 18.A tank is 3/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  19. 19.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  20. 20.8/9 − 2/3 =
  21. 21.2/5 − 3/10 =
  22. 22.Kabir has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  23. 23.A bottle has 1/6 litre of juice. Kabir drinks 1/9 litre. How much juice is left (in litres)? =
  24. 24.5/7 − 1/2 =
  25. 25.Rohan has a ribbon 9/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  26. 26.7/9 − 1/2 =
  27. 27.8/9 − 1/6 =
  28. 28.Arjun has a ribbon 1/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  29. 29.2/3 − 2/5 =
  30. 30.A tank is 4/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  31. 31.1/3 − 1/9 =
  32. 32.5/6 − 3/8 =
  33. 33.Riya has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  34. 34.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? =
  35. 35.1/4 − 1/5 =
  36. 36.Anaya has a ribbon 7/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 1/3 litre of juice. Vihaan drinks 1/9 litre. How much juice is left (in litres)? =
  38. 38.Aarav has a ribbon 1/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  39. 39.A tank is 9/10 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  40. 40.4/5 − 3/4 =

Answer key

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

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