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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 86 · 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. 1.3/5 − 1/2 =
  2. 2.A tank is 7/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  3. 3.A tank is 1/2 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  4. 4.A bottle has 8/9 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  5. 5.A tank is 5/6 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  6. 6.A bottle has 1/4 litre of juice. Anaya drinks 1/10 litre. How much juice is left (in litres)? =
  7. 7.4/9 − 1/3 =
  8. 8.7/8 − 1/4 =
  9. 9.A tank is 3/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  10. 10.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? =
  11. 11.6/7 − 1/3 =
  12. 12.A bottle has 3/8 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  13. 13.1/4 − 1/7 =
  14. 14.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? =
  15. 15.5/6 − 7/10 =
  16. 16.A tank is 2/3 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  17. 17.1/2 − 1/9 =
  18. 18.5/8 − 1/4 =
  19. 19.Riya has a ribbon 8/9 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  20. 20.9/10 − 1/5 =
  21. 21.7/9 − 2/3 =
  22. 22.3/10 − 1/4 =
  23. 23.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  24. 24.5/6 − 3/8 =
  25. 25.A bottle has 5/6 litre of juice. Sara drinks 3/8 litre. How much juice is left (in litres)? =
  26. 26.2/3 − 4/7 =
  27. 27.5/6 − 1/8 =
  28. 28.A bottle has 3/4 litre of juice. Sara drinks 3/8 litre. How much juice is left (in litres)? =
  29. 29.Riya has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  30. 30.1/3 − 1/9 =
  31. 31.2/7 − 1/4 =
  32. 32.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? =
  33. 33.Vihaan has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  34. 34.A bottle has 3/4 litre of juice. Vihaan drinks 2/5 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 9/10 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  36. 36.7/9 − 1/3 =
  37. 37.A bottle has 9/10 litre of juice. Tara drinks 5/6 litre. How much juice is left (in litres)? =
  38. 38.Diya has a ribbon 3/4 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  39. 39.Diya has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  40. 40.2/3 − 1/2 =

Answer key

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

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