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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 486 · 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 5/6 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  2. 2.A bottle has 4/5 litre of juice. Riya drinks 7/10 litre. How much juice is left (in litres)? =
  3. 3.A tank is 7/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  4. 4.3/4 − 3/7 =
  5. 5.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? =
  6. 6.3/4 − 1/2 =
  7. 7.7/10 − 2/3 =
  8. 8.A tank is 2/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  9. 9.3/4 − 1/6 =
  10. 10.2/9 − 1/6 =
  11. 11.1/3 − 1/5 =
  12. 12.1/4 − 1/8 =
  13. 13.Anaya has a ribbon 1/2 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  14. 14.5/7 − 1/4 =
  15. 15.1/2 − 1/6 =
  16. 16.2/3 − 3/10 =
  17. 17.Anaya has a ribbon 3/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  18. 18.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  19. 19.3/10 − 1/6 =
  20. 20.A tank is 3/4 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  21. 21.1/3 − 1/7 =
  22. 22.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? =
  23. 23.A bottle has 5/6 litre of juice. Riya drinks 7/9 litre. How much juice is left (in litres)? =
  24. 24.1/2 − 3/7 =
  25. 25.7/8 − 1/4 =
  26. 26.7/9 − 1/6 =
  27. 27.3/10 − 1/5 =
  28. 28.5/6 − 2/5 =
  29. 29.Arjun has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  30. 30.A bottle has 8/9 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.Anaya has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  32. 32.8/9 − 1/3 =
  33. 33.1/4 − 1/5 =
  34. 34.7/10 − 1/3 =
  35. 35.A tank is 7/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  36. 36.7/10 − 1/5 =
  37. 37.A tank is 1/2 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 1/3 litre of juice. Arjun drinks 1/7 litre. How much juice is left (in litres)? =
  39. 39.5/6 − 1/4 =
  40. 40.A bottle has 1/2 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =

Answer key

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

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