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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 414 · 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 5/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  2. 2.4/7 − 1/2 =
  3. 3.1/2 − 1/8 =
  4. 4.A bottle has 4/5 litre of juice. Diya drinks 3/10 litre. How much juice is left (in litres)? =
  5. 5.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? =
  6. 6.1/2 − 1/7 =
  7. 7.A bottle has 2/5 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  8. 8.Tara has a ribbon 9/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  9. 9.A bottle has 5/8 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  10. 10.5/6 − 4/5 =
  11. 11.Meera has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  12. 12.A tank is 1/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  13. 13.Kabir has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  14. 14.A tank is 7/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  15. 15.3/4 − 7/10 =
  16. 16.A bottle has 1/4 litre of juice. Vihaan drinks 1/10 litre. How much juice is left (in litres)? =
  17. 17.1/2 − 1/10 =
  18. 18.1/3 − 1/8 =
  19. 19.A bottle has 1/3 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =
  20. 20.A tank is 2/3 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  21. 21.A bottle has 3/7 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  22. 22.1/4 − 1/8 =
  23. 23.3/8 − 1/4 =
  24. 24.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? =
  25. 25.A bottle has 6/7 litre of juice. Tara drinks 2/3 litre. How much juice is left (in litres)? =
  26. 26.A bottle has 2/5 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  27. 27.Rohan has a ribbon 4/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  28. 28.7/8 − 5/6 =
  29. 29.A bottle has 9/10 litre of juice. Riya drinks 3/5 litre. How much juice is left (in litres)? =
  30. 30.3/5 − 3/10 =
  31. 31.A bottle has 3/4 litre of juice. Rohan drinks 1/7 litre. How much juice is left (in litres)? =
  32. 32.7/9 − 1/2 =
  33. 33.1/3 − 1/7 =
  34. 34.A bottle has 3/8 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  35. 35.7/8 − 1/3 =
  36. 36.A bottle has 8/9 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  37. 37.2/3 − 3/7 =
  38. 38.2/3 − 4/7 =
  39. 39.Riya has a ribbon 3/4 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  40. 40.4/7 − 1/4 =

Answer key

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

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