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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 346 · 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.Vihaan has a ribbon 2/3 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  2. 2.5/7 − 1/3 =
  3. 3.A bottle has 3/8 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  4. 4.4/5 − 1/2 =
  5. 5.A bottle has 3/8 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  6. 6.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  7. 7.A bottle has 5/6 litre of juice. Kabir drinks 1/5 litre. How much juice is left (in litres)? =
  8. 8.2/3 − 5/9 =
  9. 9.Tara has a ribbon 9/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  10. 10.A bottle has 1/3 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =
  11. 11.6/7 − 1/3 =
  12. 12.7/8 − 1/6 =
  13. 13.1/3 − 1/7 =
  14. 14.A bottle has 7/9 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  15. 15.Aarav has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  16. 16.A tank is 3/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  17. 17.A bottle has 4/5 litre of juice. Ishaan drinks 1/10 litre. How much juice is left (in litres)? =
  18. 18.3/4 − 2/7 =
  19. 19.A bottle has 5/6 litre of juice. Meera drinks 1/9 litre. How much juice is left (in litres)? =
  20. 20.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? =
  21. 21.A bottle has 2/3 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  22. 22.3/4 − 3/7 =
  23. 23.4/9 − 1/3 =
  24. 24.3/4 − 2/5 =
  25. 25.1/4 − 1/5 =
  26. 26.1/2 − 3/8 =
  27. 27.1/2 − 1/4 =
  28. 28.1/2 − 1/5 =
  29. 29.A tank is 2/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  30. 30.A tank is 3/4 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  31. 31.1/3 − 2/9 =
  32. 32.Rohan has a ribbon 1/2 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  33. 33.A bottle has 3/4 litre of juice. Sara drinks 1/7 litre. How much juice is left (in litres)? =
  34. 34.Ishaan has a ribbon 5/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  35. 35.Aarav has a ribbon 5/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  36. 36.Ishaan has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  37. 37.Riya has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 4/5 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  39. 39.9/10 − 5/6 =
  40. 40.3/5 − 1/4 =

Answer key

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

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