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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 756 · 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 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  2. 2.5/6 − 3/10 =
  3. 3.4/5 − 7/10 =
  4. 4.3/4 − 5/8 =
  5. 5.A bottle has 5/9 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  6. 6.5/9 − 1/2 =
  7. 7.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  8. 8.A bottle has 5/6 litre of juice. Rohan drinks 4/5 litre. How much juice is left (in litres)? =
  9. 9.8/9 − 1/2 =
  10. 10.Meera has a ribbon 1/2 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  11. 11.Sara has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  12. 12.3/8 − 1/4 =
  13. 13.Kabir has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  14. 14.3/5 − 1/6 =
  15. 15.9/10 − 1/3 =
  16. 16.1/2 − 2/5 =
  17. 17.5/7 − 1/3 =
  18. 18.1/2 − 3/7 =
  19. 19.A bottle has 1/3 litre of juice. Riya drinks 3/10 litre. How much juice is left (in litres)? =
  20. 20.3/4 − 1/7 =
  21. 21.3/5 − 1/10 =
  22. 22.1/2 − 2/9 =
  23. 23.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  24. 24.A bottle has 3/4 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  25. 25.2/3 − 1/7 =
  26. 26.2/3 − 2/5 =
  27. 27.3/5 − 1/4 =
  28. 28.5/8 − 1/3 =
  29. 29.4/5 − 1/2 =
  30. 30.A bottle has 6/7 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  31. 31.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  32. 32.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  33. 33.4/7 − 1/4 =
  34. 34.1/3 − 1/9 =
  35. 35.Sara has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  36. 36.Sara has a ribbon 3/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 4/5 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  38. 38.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? =
  39. 39.A bottle has 3/4 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  40. 40.A bottle has 7/9 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =

Answer key

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

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