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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 780 · 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 bottle has 1/2 litre of juice. Ishaan drinks 1/7 litre. How much juice is left (in litres)? =
  2. 2.Ishaan has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 3/4 litre of juice. Anaya drinks 1/8 litre. How much juice is left (in litres)? =
  4. 4.2/3 − 1/7 =
  5. 5.4/9 − 1/6 =
  6. 6.Vihaan has a ribbon 5/6 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  7. 7.5/6 − 7/9 =
  8. 8.Arjun has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  9. 9.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? =
  10. 10.A tank is 7/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  11. 11.5/8 − 1/2 =
  12. 12.A bottle has 1/4 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 7/10 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  14. 14.A tank is 7/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  15. 15.Ishaan has a ribbon 7/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  16. 16.A bottle has 7/8 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  17. 17.A bottle has 2/3 litre of juice. Kabir drinks 3/7 litre. How much juice is left (in litres)? =
  18. 18.5/7 − 2/3 =
  19. 19.9/10 − 1/4 =
  20. 20.4/9 − 1/3 =
  21. 21.A tank is 9/10 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  22. 22.A bottle has 7/9 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  23. 23.A tank is 3/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  24. 24.Rohan has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  25. 25.1/2 − 3/8 =
  26. 26.A bottle has 3/4 litre of juice. Ishaan drinks 5/7 litre. How much juice is left (in litres)? =
  27. 27.9/10 − 5/6 =
  28. 28.3/4 − 4/7 =
  29. 29.3/4 − 1/6 =
  30. 30.A bottle has 4/5 litre of juice. Meera drinks 3/10 litre. How much juice is left (in litres)? =
  31. 31.Arjun has a ribbon 7/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  32. 32.8/9 − 1/3 =
  33. 33.3/4 − 5/7 =
  34. 34.Ishaan has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  35. 35.1/4 − 1/6 =
  36. 36.1/3 − 1/4 =
  37. 37.Kabir has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 1/3 litre of juice. Vihaan drinks 1/8 litre. How much juice is left (in litres)? =
  39. 39.2/3 − 5/9 =
  40. 40.7/10 − 3/5 =

Answer key

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

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