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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 342 · 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 3/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  2. 2.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  3. 3.9/10 − 2/5 =
  4. 4.1/4 − 1/8 =
  5. 5.1/4 − 1/5 =
  6. 6.8/9 − 2/3 =
  7. 7.4/5 − 1/3 =
  8. 8.Anaya has a ribbon 7/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  9. 9.A tank is 1/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  10. 10.A bottle has 1/2 litre of juice. Diya drinks 4/9 litre. How much juice is left (in litres)? =
  11. 11.A bottle has 1/4 litre of juice. Sara drinks 1/7 litre. How much juice is left (in litres)? =
  12. 12.A bottle has 2/3 litre of juice. Arjun drinks 2/9 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 2/3 litre of juice. Meera drinks 3/7 litre. How much juice is left (in litres)? =
  14. 14.A tank is 8/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  15. 15.A bottle has 8/9 litre of juice. Sara drinks 5/6 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 2/5 litre of juice. Diya drinks 1/10 litre. How much juice is left (in litres)? =
  17. 17.5/6 − 1/5 =
  18. 18.3/4 − 1/10 =
  19. 19.Kabir has a ribbon 4/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  20. 20.5/9 − 1/3 =
  21. 21.3/4 − 4/7 =
  22. 22.9/10 − 3/5 =
  23. 23.2/5 − 1/3 =
  24. 24.8/9 − 1/3 =
  25. 25.7/9 − 1/6 =
  26. 26.Ishaan has a ribbon 5/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  27. 27.A tank is 5/6 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  28. 28.A bottle has 3/4 litre of juice. Rohan drinks 2/5 litre. How much juice is left (in litres)? =
  29. 29.Anaya has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  30. 30.3/4 − 5/7 =
  31. 31.A tank is 5/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  32. 32.A bottle has 1/2 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 1/3 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =
  34. 34.Rohan has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  35. 35.6/7 − 1/2 =
  36. 36.4/5 − 3/4 =
  37. 37.2/7 − 1/4 =
  38. 38.Rohan has a ribbon 5/6 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  39. 39.9/10 − 4/5 =
  40. 40.A tank is 7/8 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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