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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 325 · 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 − 1/8 =
  2. 2.7/10 − 1/6 =
  3. 3.1/2 − 1/7 =
  4. 4.A bottle has 4/5 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  5. 5.Kabir has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  6. 6.1/5 − 1/6 =
  7. 7.2/3 − 3/10 =
  8. 8.A bottle has 3/4 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 7/8 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  10. 10.3/10 − 1/5 =
  11. 11.A bottle has 3/5 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  12. 12.1/2 − 1/6 =
  13. 13.7/9 − 1/3 =
  14. 14.1/3 − 1/4 =
  15. 15.A bottle has 5/6 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  16. 16.7/8 − 2/3 =
  17. 17.A bottle has 1/3 litre of juice. Rohan drinks 2/7 litre. How much juice is left (in litres)? =
  18. 18.Kabir has a ribbon 5/6 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  19. 19.5/6 − 2/9 =
  20. 20.3/4 − 5/7 =
  21. 21.8/9 − 5/6 =
  22. 22.1/2 − 1/5 =
  23. 23.A bottle has 3/4 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  24. 24.A bottle has 1/2 litre of juice. Riya drinks 4/9 litre. How much juice is left (in litres)? =
  25. 25.3/4 − 3/8 =
  26. 26.4/5 − 1/6 =
  27. 27.A bottle has 2/3 litre of juice. Rohan drinks 2/7 litre. How much juice is left (in litres)? =
  28. 28.3/4 − 1/10 =
  29. 29.A tank is 3/4 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  30. 30.A bottle has 5/6 litre of juice. Sara drinks 2/5 litre. How much juice is left (in litres)? =
  31. 31.1/3 − 1/9 =
  32. 32.3/4 − 1/7 =
  33. 33.A tank is 1/2 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  34. 34.A bottle has 2/3 litre of juice. Ishaan drinks 5/9 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 9/10 litre of juice. Anaya drinks 3/4 litre. How much juice is left (in litres)? =
  36. 36.4/7 − 1/3 =
  37. 37.4/5 − 3/4 =
  38. 38.Riya has a ribbon 4/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  39. 39.3/8 − 1/4 =
  40. 40.8/9 − 1/3 =

Answer key

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

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