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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 140 · 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 9/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  2. 2.8/9 − 1/2 =
  3. 3.A bottle has 1/3 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =
  4. 4.2/3 − 5/9 =
  5. 5.5/6 − 2/5 =
  6. 6.Arjun has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  7. 7.Anaya has a ribbon 3/4 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  8. 8.A bottle has 7/10 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  9. 9.Arjun has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  10. 10.Sara has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  11. 11.3/8 − 1/4 =
  12. 12.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? =
  13. 13.2/5 − 1/6 =
  14. 14.A bottle has 1/5 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  15. 15.3/5 − 1/4 =
  16. 16.1/2 − 2/9 =
  17. 17.8/9 − 2/3 =
  18. 18.4/5 − 1/4 =
  19. 19.A bottle has 5/8 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  20. 20.Arjun has a ribbon 1/2 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  21. 21.Sara has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  22. 22.4/5 − 7/10 =
  23. 23.7/9 − 1/6 =
  24. 24.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  25. 25.7/10 − 1/3 =
  26. 26.8/9 − 1/3 =
  27. 27.3/5 − 3/10 =
  28. 28.A bottle has 3/4 litre of juice. Riya drinks 5/8 litre. How much juice is left (in litres)? =
  29. 29.3/4 − 5/7 =
  30. 30.1/3 − 2/7 =
  31. 31.A bottle has 2/3 litre of juice. Arjun drinks 1/9 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 3/4 litre of juice. Meera drinks 4/7 litre. How much juice is left (in litres)? =
  33. 33.Ishaan has a ribbon 2/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  34. 34.A bottle has 5/7 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  35. 35.1/3 − 1/9 =
  36. 36.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  37. 37.3/8 − 1/3 =
  38. 38.9/10 − 4/5 =
  39. 39.A tank is 2/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  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. 7/10
  2. 7/18
  3. 2/9
  4. 1/9
  5. 13/30
  6. 1/10
  7. 13/28
  8. 1/2
  9. 1/9
  10. 13/28
  11. 1/8
  12. 7/20
  13. 7/30
  14. 1/30
  15. 7/20
  16. 5/18
  17. 2/9
  18. 11/20
  19. 3/8
  20. 1/3
  21. 2/15
  22. 1/10
  23. 11/18
  24. 5/9
  25. 11/30
  26. 5/9
  27. 3/10
  28. 1/8
  29. 1/28
  30. 1/21
  31. 5/9
  32. 5/28
  33. 1/15
  34. 8/21
  35. 2/9
  36. 1/20
  37. 1/24
  38. 1/10
  39. 17/30
  40. 7/18

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