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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 605 · 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. 1.5/7 − 1/3 =
  2. 2.1/2 − 3/7 =
  3. 3.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  4. 4.A tank is 2/3 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  5. 5.7/8 − 1/4 =
  6. 6.A tank is 2/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  7. 7.A bottle has 5/8 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  8. 8.1/3 − 1/8 =
  9. 9.Ishaan has a ribbon 1/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  10. 10.A bottle has 7/8 litre of juice. Vihaan drinks 3/4 litre. How much juice is left (in litres)? =
  11. 11.7/9 − 1/3 =
  12. 12.A bottle has 1/4 litre of juice. Aarav drinks 1/7 litre. How much juice is left (in litres)? =
  13. 13.2/5 − 1/6 =
  14. 14.5/6 − 7/9 =
  15. 15.A tank is 5/6 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  16. 16.7/8 − 1/2 =
  17. 17.A bottle has 2/3 litre of juice. Aarav drinks 4/9 litre. How much juice is left (in litres)? =
  18. 18.Diya has a ribbon 1/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  19. 19.3/4 − 4/7 =
  20. 20.1/2 − 1/10 =
  21. 21.3/5 − 1/10 =
  22. 22.A bottle has 3/10 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  23. 23.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  24. 24.A bottle has 1/6 litre of juice. Sara drinks 1/9 litre. How much juice is left (in litres)? =
  25. 25.8/9 − 2/3 =
  26. 26.A bottle has 3/4 litre of juice. Tara drinks 1/8 litre. How much juice is left (in litres)? =
  27. 27.A bottle has 7/9 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  28. 28.2/3 − 5/9 =
  29. 29.1/6 − 1/9 =
  30. 30.1/4 − 1/5 =
  31. 31.1/4 − 1/6 =
  32. 32.3/4 − 1/7 =
  33. 33.3/8 − 1/4 =
  34. 34.5/7 − 1/4 =
  35. 35.A tank is 7/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  36. 36.5/6 − 1/9 =
  37. 37.Anaya has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  38. 38.Sara has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  39. 39.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  40. 40.A bottle has 5/7 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =

Answer key

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

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