← Subtracting fractions: different denominators lesson New set →

Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 43 · 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. 1.7/10 − 1/3 =
  2. 2.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  3. 3.1/4 − 1/10 =
  4. 4.1/3 − 2/7 =
  5. 5.1/3 − 1/7 =
  6. 6.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? =
  7. 7.4/9 − 1/6 =
  8. 8.5/6 − 2/5 =
  9. 9.A tank is 5/6 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  10. 10.5/8 − 1/3 =
  11. 11.A tank is 3/4 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  12. 12.5/7 − 2/3 =
  13. 13.6/7 − 2/3 =
  14. 14.2/3 − 2/9 =
  15. 15.A tank is 9/10 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  16. 16.Sara has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  17. 17.7/10 − 2/5 =
  18. 18.5/8 − 1/2 =
  19. 19.2/5 − 3/10 =
  20. 20.Vihaan has a ribbon 5/6 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  21. 21.2/3 − 1/6 =
  22. 22.Arjun has a ribbon 3/4 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  23. 23.5/9 − 1/2 =
  24. 24.A bottle has 2/3 litre of juice. Anaya drinks 1/9 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 5/6 litre of juice. Sara drinks 3/5 litre. How much juice is left (in litres)? =
  26. 26.2/3 − 5/8 =
  27. 27.5/9 − 1/3 =
  28. 28.3/5 − 1/6 =
  29. 29.3/4 − 2/5 =
  30. 30.5/7 − 1/2 =
  31. 31.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  32. 32.6/7 − 3/4 =
  33. 33.2/3 − 1/7 =
  34. 34.2/3 − 1/10 =
  35. 35.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? =
  36. 36.1/3 − 1/8 =
  37. 37.Sara has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  38. 38.9/10 − 3/5 =
  39. 39.Vihaan has a ribbon 1/2 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  40. 40.Kabir has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =

Answer key

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

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