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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 313 · 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 tank is 4/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  2. 2.5/6 − 1/4 =
  3. 3.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? =
  4. 4.2/3 − 2/9 =
  5. 5.A bottle has 2/3 litre of juice. Sara drinks 3/10 litre. How much juice is left (in litres)? =
  6. 6.1/2 − 1/9 =
  7. 7.7/9 − 2/3 =
  8. 8.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? =
  9. 9.Kabir has a ribbon 7/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  10. 10.4/5 − 2/3 =
  11. 11.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  12. 12.A bottle has 3/4 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  13. 13.4/5 − 1/10 =
  14. 14.5/6 − 3/4 =
  15. 15.A bottle has 2/9 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  16. 16.Ishaan has a ribbon 4/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 4/5 litre of juice. Arjun drinks 3/10 litre. How much juice is left (in litres)? =
  18. 18.2/3 − 1/4 =
  19. 19.A tank is 5/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  20. 20.Riya has a ribbon 8/9 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  21. 21.7/8 − 1/2 =
  22. 22.Aarav has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  23. 23.2/3 − 5/9 =
  24. 24.3/4 − 1/8 =
  25. 25.2/9 − 1/6 =
  26. 26.9/10 − 1/3 =
  27. 27.A bottle has 2/3 litre of juice. Aarav drinks 3/5 litre. How much juice is left (in litres)? =
  28. 28.1/2 − 3/10 =
  29. 29.1/3 − 2/7 =
  30. 30.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 1/6 litre of juice. Tara drinks 1/8 litre. How much juice is left (in litres)? =
  32. 32.7/10 − 3/5 =
  33. 33.A bottle has 6/7 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  34. 34.1/4 − 1/6 =
  35. 35.8/9 − 1/2 =
  36. 36.9/10 − 5/6 =
  37. 37.A bottle has 8/9 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  38. 38.1/2 − 1/4 =
  39. 39.A tank is 5/6 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  40. 40.Arjun has a ribbon 3/4 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =

Answer key

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

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