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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 935 · 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.Rohan has a ribbon 2/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  2. 2.5/6 − 4/5 =
  3. 3.7/10 − 1/5 =
  4. 4.3/4 − 4/7 =
  5. 5.A tank is 2/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  6. 6.A tank is 2/3 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  7. 7.A bottle has 3/4 litre of juice. Aarav drinks 3/8 litre. How much juice is left (in litres)? =
  8. 8.Sara has a ribbon 3/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  9. 9.4/5 − 1/4 =
  10. 10.A tank is 1/2 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  11. 11.8/9 − 1/3 =
  12. 12.A tank is 7/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  13. 13.A bottle has 4/5 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  14. 14.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? =
  15. 15.Riya has a ribbon 5/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  16. 16.A bottle has 5/6 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  17. 17.A tank is 2/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  18. 18.A tank is 1/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  19. 19.4/5 − 1/2 =
  20. 20.2/3 − 2/5 =
  21. 21.Riya has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 2/5 litre of juice. Meera drinks 1/10 litre. How much juice is left (in litres)? =
  23. 23.2/3 − 1/7 =
  24. 24.A tank is 4/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  25. 25.A bottle has 2/9 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  26. 26.1/2 − 1/10 =
  27. 27.2/3 − 4/7 =
  28. 28.1/3 − 1/9 =
  29. 29.5/9 − 1/3 =
  30. 30.1/2 − 3/10 =
  31. 31.A bottle has 7/9 litre of juice. Rohan drinks 2/3 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 5/6 litre of juice. Anaya drinks 1/5 litre. How much juice is left (in litres)? =
  33. 33.A tank is 5/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  34. 34.Aarav has a ribbon 5/6 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  35. 35.Ishaan has a ribbon 5/6 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  36. 36.A bottle has 8/9 litre of juice. Rohan drinks 5/6 litre. How much juice is left (in litres)? =
  37. 37.Aarav has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 2/5 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  39. 39.A tank is 4/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  40. 40.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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