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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 722 · 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 5/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  2. 2.5/6 − 1/3 =
  3. 3.3/4 − 1/10 =
  4. 4.2/3 − 4/9 =
  5. 5.3/4 − 1/6 =
  6. 6.A bottle has 9/10 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  7. 7.7/9 − 1/3 =
  8. 8.5/6 − 1/10 =
  9. 9.2/3 − 1/7 =
  10. 10.A bottle has 3/4 litre of juice. Aarav drinks 3/5 litre. How much juice is left (in litres)? =
  11. 11.1/6 − 1/9 =
  12. 12.A bottle has 9/10 litre of juice. Meera drinks 2/5 litre. How much juice is left (in litres)? =
  13. 13.7/8 − 1/6 =
  14. 14.Meera has a ribbon 3/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  15. 15.A bottle has 2/3 litre of juice. Tara drinks 1/10 litre. How much juice is left (in litres)? =
  16. 16.A tank is 5/6 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  17. 17.5/7 − 1/2 =
  18. 18.4/5 − 1/4 =
  19. 19.2/3 − 4/7 =
  20. 20.Sara has a ribbon 1/3 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  21. 21.Anaya has a ribbon 1/2 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  22. 22.9/10 − 1/4 =
  23. 23.A tank is 2/3 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  24. 24.Diya has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  25. 25.A tank is 7/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  26. 26.1/3 − 1/10 =
  27. 27.3/4 − 2/5 =
  28. 28.A tank is 2/3 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  29. 29.5/6 − 7/9 =
  30. 30.A bottle has 6/7 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.A tank is 4/5 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  32. 32.A bottle has 2/3 litre of juice. Aarav drinks 5/9 litre. How much juice is left (in litres)? =
  33. 33.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  34. 34.2/7 − 1/4 =
  35. 35.A bottle has 1/5 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 4/5 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  37. 37.1/4 − 1/10 =
  38. 38.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  39. 39.3/5 − 1/3 =
  40. 40.9/10 − 2/5 =

Answer key

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

Free fractions lessons, practice and worksheets at talentjr.in/fractions-for-kids