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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 206 · 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 − 4/9 =
  2. 2.Rohan has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  3. 3.5/6 − 1/4 =
  4. 4.1/3 − 2/9 =
  5. 5.A bottle has 1/3 litre of juice. Tara drinks 1/5 litre. How much juice is left (in litres)? =
  6. 6.5/9 − 1/6 =
  7. 7.Ishaan has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  8. 8.A tank is 5/6 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  9. 9.A bottle has 7/8 litre of juice. Arjun drinks 3/4 litre. How much juice is left (in litres)? =
  10. 10.8/9 − 1/3 =
  11. 11.A bottle has 7/8 litre of juice. Arjun drinks 2/3 litre. How much juice is left (in litres)? =
  12. 12.9/10 − 2/5 =
  13. 13.3/4 − 1/8 =
  14. 14.1/2 − 1/10 =
  15. 15.A bottle has 7/10 litre of juice. Sara drinks 3/5 litre. How much juice is left (in litres)? =
  16. 16.2/5 − 1/10 =
  17. 17.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? =
  18. 18.A tank is 3/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  19. 19.5/7 − 1/2 =
  20. 20.Riya has a ribbon 3/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  21. 21.8/9 − 1/2 =
  22. 22.A bottle has 4/7 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  23. 23.1/2 − 2/7 =
  24. 24.7/9 − 1/2 =
  25. 25.A tank is 6/7 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  26. 26.2/3 − 3/8 =
  27. 27.5/6 − 1/8 =
  28. 28.Ishaan has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  29. 29.A bottle has 3/4 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =
  30. 30.3/7 − 1/4 =
  31. 31.2/3 − 4/9 =
  32. 32.A bottle has 4/5 litre of juice. Aarav drinks 7/10 litre. How much juice is left (in litres)? =
  33. 33.A tank is 3/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  34. 34.A tank is 5/6 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  35. 35.4/5 − 1/4 =
  36. 36.2/3 − 1/6 =
  37. 37.5/6 − 2/3 =
  38. 38.A bottle has 1/2 litre of juice. Sara drinks 1/7 litre. How much juice is left (in litres)? =
  39. 39.Anaya has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  40. 40.A bottle has 4/5 litre of juice. Sara drinks 3/4 litre. How much juice is left (in litres)? =

Answer key

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

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