← Subtracting fractions: different denominators lesson New set →

Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 440 · 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.Meera has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  2. 2.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  3. 3.3/4 − 2/7 =
  4. 4.4/7 − 1/3 =
  5. 5.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  6. 6.7/10 − 1/5 =
  7. 7.Sara has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  8. 8.A tank is 5/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  9. 9.5/9 − 1/2 =
  10. 10.9/10 − 1/2 =
  11. 11.1/5 − 1/6 =
  12. 12.2/3 − 3/10 =
  13. 13.3/4 − 1/7 =
  14. 14.A bottle has 2/5 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  15. 15.7/10 − 1/6 =
  16. 16.1/3 − 1/10 =
  17. 17.2/3 − 3/5 =
  18. 18.A tank is 4/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  19. 19.Diya has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  20. 20.A bottle has 9/10 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  21. 21.3/8 − 1/4 =
  22. 22.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  23. 23.2/3 − 2/9 =
  24. 24.Ishaan has a ribbon 1/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  25. 25.Meera has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  26. 26.4/5 − 3/10 =
  27. 27.5/7 − 1/3 =
  28. 28.A tank is 3/4 full of water. Then water filling 5/7 of the tank is used. What fraction of the tank is full now? =
  29. 29.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  30. 30.5/6 − 3/10 =
  31. 31.6/7 − 1/4 =
  32. 32.A tank is 1/2 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  33. 33.1/5 − 1/10 =
  34. 34.2/3 − 5/8 =
  35. 35.5/6 − 2/3 =
  36. 36.Tara has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 7/10 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  38. 38.7/8 − 1/6 =
  39. 39.Rohan has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  40. 40.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? =

Answer key

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

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