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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 796 · 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. 1.6/7 − 2/3 =
  2. 2.3/7 − 1/3 =
  3. 3.A tank is 3/4 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 3/4 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  5. 5.5/6 − 1/4 =
  6. 6.A tank is 4/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  7. 7.A bottle has 1/2 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  8. 8.9/10 − 4/5 =
  9. 9.Arjun has a ribbon 2/3 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  10. 10.7/10 − 2/3 =
  11. 11.1/6 − 1/8 =
  12. 12.3/7 − 1/4 =
  13. 13.1/2 − 3/7 =
  14. 14.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? =
  15. 15.Ishaan has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  16. 16.A bottle has 1/2 litre of juice. Kabir drinks 1/8 litre. How much juice is left (in litres)? =
  17. 17.2/3 − 1/10 =
  18. 18.7/10 − 2/5 =
  19. 19.Diya has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  20. 20.3/5 − 1/10 =
  21. 21.A bottle has 4/5 litre of juice. Arjun drinks 1/10 litre. How much juice is left (in litres)? =
  22. 22.Kabir has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  23. 23.4/5 − 1/3 =
  24. 24.4/5 − 3/10 =
  25. 25.1/3 − 2/9 =
  26. 26.1/2 − 4/9 =
  27. 27.A tank is 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  28. 28.A tank is 2/3 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  29. 29.A tank is 1/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  30. 30.3/10 − 1/5 =
  31. 31.3/5 − 1/3 =
  32. 32.A bottle has 1/2 litre of juice. Arjun drinks 1/8 litre. How much juice is left (in litres)? =
  33. 33.1/3 − 1/10 =
  34. 34.6/7 − 1/3 =
  35. 35.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  36. 36.8/9 − 2/3 =
  37. 37.1/2 − 1/10 =
  38. 38.A tank is 5/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  39. 39.5/8 − 1/6 =
  40. 40.Diya has a ribbon 3/4 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =

Answer key

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

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