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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 177 · 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. 1.5/6 − 7/9 =
  2. 2.5/8 − 1/3 =
  3. 3.1/4 − 1/7 =
  4. 4.1/2 − 1/7 =
  5. 5.3/4 − 1/2 =
  6. 6.2/3 − 2/9 =
  7. 7.1/2 − 3/7 =
  8. 8.5/9 − 1/2 =
  9. 9.Ishaan has a ribbon 5/6 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  10. 10.1/2 − 1/5 =
  11. 11.1/3 − 1/4 =
  12. 12.A bottle has 7/10 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  13. 13.2/5 − 3/10 =
  14. 14.7/8 − 1/3 =
  15. 15.3/8 − 1/6 =
  16. 16.3/4 − 5/8 =
  17. 17.Riya has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  18. 18.A bottle has 1/2 litre of juice. Diya drinks 1/9 litre. How much juice is left (in litres)? =
  19. 19.A tank is 4/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  20. 20.Tara has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  21. 21.1/2 − 1/9 =
  22. 22.A tank is 5/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  23. 23.Aarav has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  24. 24.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? =
  25. 25.3/4 − 2/7 =
  26. 26.1/3 − 1/10 =
  27. 27.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  28. 28.A bottle has 5/9 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  29. 29.Meera has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  30. 30.Arjun has a ribbon 2/3 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  31. 31.A bottle has 7/9 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  32. 32.A tank is 1/2 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  33. 33.8/9 − 1/2 =
  34. 34.3/4 − 1/5 =
  35. 35.3/10 − 1/5 =
  36. 36.A bottle has 5/6 litre of juice. Rohan drinks 3/5 litre. How much juice is left (in litres)? =
  37. 37.A tank is 8/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 4/7 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  39. 39.5/9 − 1/3 =
  40. 40.5/6 − 1/2 =

Answer key

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

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