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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 372 · 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. 1.6/7 − 2/3 =
  2. 2.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  3. 3.Aarav has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  4. 4.2/7 − 1/4 =
  5. 5.8/9 − 5/6 =
  6. 6.A bottle has 3/10 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  7. 7.A bottle has 4/5 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  8. 8.2/3 − 1/9 =
  9. 9.A bottle has 1/4 litre of juice. Anaya drinks 1/10 litre. How much juice is left (in litres)? =
  10. 10.7/9 − 1/3 =
  11. 11.Ishaan has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  12. 12.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  13. 13.Ishaan has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  14. 14.A bottle has 1/2 litre of juice. Aarav drinks 2/9 litre. How much juice is left (in litres)? =
  15. 15.A tank is 9/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  16. 16.A tank is 3/4 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  17. 17.A bottle has 1/2 litre of juice. Arjun drinks 1/10 litre. How much juice is left (in litres)? =
  18. 18.A bottle has 5/6 litre of juice. Anaya drinks 4/9 litre. How much juice is left (in litres)? =
  19. 19.4/7 − 1/4 =
  20. 20.A bottle has 6/7 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  21. 21.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? =
  22. 22.A tank is 1/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  23. 23.3/10 − 1/4 =
  24. 24.3/4 − 2/5 =
  25. 25.A bottle has 8/9 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  26. 26.1/2 − 2/9 =
  27. 27.3/4 − 2/3 =
  28. 28.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  29. 29.A bottle has 3/5 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  30. 30.8/9 − 1/6 =
  31. 31.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? =
  32. 32.1/6 − 1/8 =
  33. 33.7/8 − 1/6 =
  34. 34.Aarav has a ribbon 3/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  35. 35.3/8 − 1/6 =
  36. 36.7/8 − 1/4 =
  37. 37.1/4 − 1/10 =
  38. 38.Ishaan has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 3/4 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  40. 40.3/4 − 5/8 =

Answer key

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

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