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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 618 · 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.Kabir has a ribbon 9/10 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  2. 2.Riya has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  3. 3.7/9 − 1/3 =
  4. 4.1/3 − 1/6 =
  5. 5.Vihaan has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  6. 6.A tank is 3/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  7. 7.7/8 − 2/3 =
  8. 8.1/2 − 1/4 =
  9. 9.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  10. 10.1/2 − 3/10 =
  11. 11.2/3 − 1/8 =
  12. 12.2/5 − 1/3 =
  13. 13.Diya has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  14. 14.7/8 − 3/4 =
  15. 15.1/2 − 2/7 =
  16. 16.A tank is 3/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  17. 17.A tank is 4/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  18. 18.1/4 − 1/7 =
  19. 19.2/3 − 4/9 =
  20. 20.A tank is 2/3 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  21. 21.A bottle has 9/10 litre of juice. Rohan drinks 4/5 litre. How much juice is left (in litres)? =
  22. 22.Riya has a ribbon 3/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  23. 23.A bottle has 8/9 litre of juice. Diya drinks 5/6 litre. How much juice is left (in litres)? =
  24. 24.Tara has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  25. 25.5/8 − 1/6 =
  26. 26.8/9 − 5/6 =
  27. 27.7/8 − 1/3 =
  28. 28.5/7 − 1/2 =
  29. 29.Ishaan has a ribbon 9/10 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  30. 30.1/2 − 4/9 =
  31. 31.Vihaan has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  32. 32.Meera has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  33. 33.1/6 − 1/9 =
  34. 34.3/5 − 1/6 =
  35. 35.9/10 − 4/5 =
  36. 36.Tara has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 3/8 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  38. 38.3/10 − 1/6 =
  39. 39.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  40. 40.1/3 − 2/7 =

Answer key

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

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