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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 577 · 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. 1.5/6 − 5/9 =
  2. 2.A bottle has 3/4 litre of juice. Meera drinks 1/10 litre. How much juice is left (in litres)? =
  3. 3.2/3 − 2/5 =
  4. 4.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  5. 5.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? =
  6. 6.A bottle has 3/4 litre of juice. Rohan drinks 3/8 litre. How much juice is left (in litres)? =
  7. 7.3/4 − 1/6 =
  8. 8.A tank is 1/2 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  9. 9.A bottle has 3/8 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  10. 10.6/7 − 1/2 =
  11. 11.Meera has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  12. 12.1/2 − 1/3 =
  13. 13.5/6 − 4/5 =
  14. 14.7/10 − 1/4 =
  15. 15.Ishaan has a ribbon 2/3 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  16. 16.A bottle has 1/3 litre of juice. Diya drinks 1/5 litre. How much juice is left (in litres)? =
  17. 17.Diya has a ribbon 7/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  18. 18.A bottle has 6/7 litre of juice. Diya drinks 2/3 litre. How much juice is left (in litres)? =
  19. 19.2/3 − 3/10 =
  20. 20.A bottle has 2/3 litre of juice. Rohan drinks 5/9 litre. How much juice is left (in litres)? =
  21. 21.2/9 − 1/6 =
  22. 22.A tank is 6/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  23. 23.3/4 − 7/10 =
  24. 24.9/10 − 1/4 =
  25. 25.1/3 − 1/10 =
  26. 26.A tank is 7/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  27. 27.A bottle has 5/6 litre of juice. Sara drinks 4/5 litre. How much juice is left (in litres)? =
  28. 28.2/3 − 1/7 =
  29. 29.4/9 − 1/6 =
  30. 30.A bottle has 9/10 litre of juice. Riya drinks 5/6 litre. How much juice is left (in litres)? =
  31. 31.A tank is 3/4 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  32. 32.3/4 − 3/8 =
  33. 33.1/3 − 1/5 =
  34. 34.A bottle has 9/10 litre of juice. Rohan drinks 3/5 litre. How much juice is left (in litres)? =
  35. 35.3/8 − 1/4 =
  36. 36.Anaya has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  37. 37.1/2 − 2/9 =
  38. 38.3/7 − 1/3 =
  39. 39.3/5 − 1/10 =
  40. 40.A tank is 5/6 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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