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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 975 · 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 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  2. 2.A bottle has 3/4 litre of juice. Tara drinks 1/10 litre. How much juice is left (in litres)? =
  3. 3.9/10 − 3/4 =
  4. 4.5/6 − 5/8 =
  5. 5.4/7 − 1/3 =
  6. 6.3/5 − 1/10 =
  7. 7.3/10 − 1/5 =
  8. 8.1/2 − 4/9 =
  9. 9.1/2 − 1/10 =
  10. 10.1/4 − 1/8 =
  11. 11.A tank is 2/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  12. 12.Ishaan has a ribbon 2/3 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  13. 13.Rohan has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  14. 14.A tank is 1/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  15. 15.Rohan has a ribbon 7/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  16. 16.1/4 − 1/10 =
  17. 17.7/8 − 1/2 =
  18. 18.A tank is 4/5 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  19. 19.2/3 − 2/9 =
  20. 20.1/4 − 1/5 =
  21. 21.7/9 − 1/3 =
  22. 22.2/3 − 3/5 =
  23. 23.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? =
  24. 24.Ishaan has a ribbon 3/4 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  25. 25.3/4 − 1/8 =
  26. 26.1/2 − 1/7 =
  27. 27.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? =
  28. 28.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? =
  29. 29.A tank is 7/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  30. 30.A tank is 9/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  31. 31.A tank is 5/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  32. 32.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? =
  33. 33.5/6 − 1/4 =
  34. 34.A tank is 2/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  35. 35.A tank is 1/2 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  36. 36.Ishaan has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  37. 37.7/8 − 1/3 =
  38. 38.A tank is 1/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  39. 39.A tank is 1/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  40. 40.Diya has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =

Answer key

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

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