← Subtracting fractions: different denominators lesson New set →

Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 388 · 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. 1.3/4 − 2/5 =
  2. 2.9/10 − 5/6 =
  3. 3.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? =
  4. 4.A bottle has 1/2 litre of juice. Vihaan drinks 4/9 litre. How much juice is left (in litres)? =
  5. 5.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? =
  6. 6.A tank is 1/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  7. 7.2/3 − 2/5 =
  8. 8.3/7 − 1/3 =
  9. 9.Anaya has a ribbon 1/2 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  10. 10.3/4 − 2/7 =
  11. 11.3/5 − 3/10 =
  12. 12.A bottle has 4/7 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 1/2 litre of juice. Anaya drinks 1/10 litre. How much juice is left (in litres)? =
  14. 14.5/6 − 2/9 =
  15. 15.5/8 − 1/2 =
  16. 16.A bottle has 1/2 litre of juice. Vihaan drinks 3/8 litre. How much juice is left (in litres)? =
  17. 17.Riya has a ribbon 3/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  18. 18.A tank is 5/6 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  19. 19.Tara has a ribbon 3/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  20. 20.A bottle has 1/4 litre of juice. Ishaan drinks 1/10 litre. How much juice is left (in litres)? =
  21. 21.A bottle has 5/6 litre of juice. Meera drinks 5/8 litre. How much juice is left (in litres)? =
  22. 22.1/5 − 1/6 =
  23. 23.7/10 − 2/3 =
  24. 24.5/7 − 2/3 =
  25. 25.1/3 − 1/7 =
  26. 26.4/7 − 1/2 =
  27. 27.8/9 − 1/2 =
  28. 28.Kabir has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  29. 29.7/10 − 1/6 =
  30. 30.3/4 − 1/10 =
  31. 31.A tank is 7/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  32. 32.2/3 − 2/7 =
  33. 33.A tank is 9/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  34. 34.4/5 − 1/4 =
  35. 35.1/4 − 1/8 =
  36. 36.2/3 − 3/10 =
  37. 37.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  38. 38.8/9 − 1/6 =
  39. 39.6/7 − 1/4 =
  40. 40.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? =

Answer key

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

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