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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 738 · 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 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  2. 2.7/9 − 1/3 =
  3. 3.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  4. 4.A tank is 3/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  5. 5.7/9 − 1/2 =
  6. 6.1/2 − 4/9 =
  7. 7.A bottle has 3/4 litre of juice. Riya drinks 7/10 litre. How much juice is left (in litres)? =
  8. 8.3/4 − 1/7 =
  9. 9.Riya has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  10. 10.A bottle has 5/6 litre of juice. Sara drinks 4/9 litre. How much juice is left (in litres)? =
  11. 11.Arjun has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  12. 12.1/3 − 1/7 =
  13. 13.7/10 − 1/4 =
  14. 14.3/5 − 1/2 =
  15. 15.Ishaan has a ribbon 7/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  16. 16.6/7 − 1/3 =
  17. 17.Anaya has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  18. 18.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  19. 19.4/5 − 2/3 =
  20. 20.3/4 − 7/10 =
  21. 21.2/9 − 1/6 =
  22. 22.1/2 − 2/7 =
  23. 23.A bottle has 5/9 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  24. 24.3/10 − 1/6 =
  25. 25.Ishaan has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  26. 26.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  27. 27.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? =
  28. 28.A bottle has 1/2 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  29. 29.A bottle has 4/5 litre of juice. Rohan drinks 3/10 litre. How much juice is left (in litres)? =
  30. 30.A bottle has 7/8 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.7/9 − 2/3 =
  32. 32.3/4 − 3/5 =
  33. 33.Aarav has a ribbon 3/4 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  34. 34.A bottle has 1/3 litre of juice. Riya drinks 1/7 litre. How much juice is left (in litres)? =
  35. 35.A tank is 5/6 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  36. 36.5/6 − 3/8 =
  37. 37.4/5 − 1/2 =
  38. 38.Meera has a ribbon 7/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  39. 39.2/3 − 3/8 =
  40. 40.Diya has a ribbon 4/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =

Answer key

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

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