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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 310 · 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. 1.6/7 − 3/4 =
  2. 2.A bottle has 1/2 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  3. 3.2/3 − 4/7 =
  4. 4.A bottle has 5/6 litre of juice. Anaya drinks 4/9 litre. How much juice is left (in litres)? =
  5. 5.A tank is 2/3 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  6. 6.Riya has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  7. 7.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? =
  8. 8.A bottle has 3/4 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  9. 9.A tank is 3/4 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  10. 10.1/3 − 1/7 =
  11. 11.3/4 − 5/7 =
  12. 12.A tank is 4/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  13. 13.Anaya has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  14. 14.2/9 − 1/6 =
  15. 15.1/4 − 1/7 =
  16. 16.2/3 − 1/5 =
  17. 17.Sara has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  18. 18.A bottle has 1/4 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  19. 19.3/10 − 1/5 =
  20. 20.3/5 − 1/2 =
  21. 21.3/4 − 4/7 =
  22. 22.6/7 − 1/3 =
  23. 23.A bottle has 2/3 litre of juice. Diya drinks 5/9 litre. How much juice is left (in litres)? =
  24. 24.Arjun has a ribbon 4/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  25. 25.5/7 − 1/3 =
  26. 26.2/3 − 3/7 =
  27. 27.5/8 − 1/2 =
  28. 28.Aarav has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  29. 29.3/8 − 1/4 =
  30. 30.1/3 − 1/10 =
  31. 31.A bottle has 1/4 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  32. 32.4/7 − 1/4 =
  33. 33.3/10 − 1/6 =
  34. 34.7/10 − 1/2 =
  35. 35.1/4 − 1/8 =
  36. 36.3/5 − 1/6 =
  37. 37.6/7 − 1/2 =
  38. 38.5/6 − 1/8 =
  39. 39.A bottle has 5/6 litre of juice. Aarav drinks 2/5 litre. How much juice is left (in litres)? =
  40. 40.Anaya has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =

Answer key

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

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