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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 650 · 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.A bottle has 2/3 litre of juice. Ishaan drinks 1/8 litre. How much juice is left (in litres)? =
  2. 2.3/4 − 1/10 =
  3. 3.3/4 − 1/6 =
  4. 4.2/3 − 1/4 =
  5. 5.2/3 − 5/8 =
  6. 6.Anaya has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  7. 7.A bottle has 4/5 litre of juice. Anaya drinks 3/10 litre. How much juice is left (in litres)? =
  8. 8.3/4 − 3/8 =
  9. 9.A tank is 5/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  10. 10.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? =
  11. 11.Rohan has a ribbon 3/4 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  12. 12.3/5 − 1/6 =
  13. 13.A tank is 1/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  14. 14.3/4 − 3/7 =
  15. 15.7/9 − 2/3 =
  16. 16.2/5 − 1/3 =
  17. 17.A bottle has 1/4 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  18. 18.5/6 − 5/9 =
  19. 19.Anaya has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  20. 20.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  21. 21.1/2 − 3/7 =
  22. 22.A tank is 2/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  23. 23.7/10 − 1/6 =
  24. 24.1/3 − 1/10 =
  25. 25.A bottle has 1/5 litre of juice. Rohan drinks 1/10 litre. How much juice is left (in litres)? =
  26. 26.1/3 − 3/10 =
  27. 27.4/5 − 3/4 =
  28. 28.2/3 − 3/8 =
  29. 29.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? =
  30. 30.3/5 − 1/10 =
  31. 31.A bottle has 9/10 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 5/6 litre of juice. Anaya drinks 4/5 litre. How much juice is left (in litres)? =
  33. 33.6/7 − 2/3 =
  34. 34.5/7 − 1/2 =
  35. 35.3/7 − 1/4 =
  36. 36.2/3 − 2/7 =
  37. 37.3/4 − 1/7 =
  38. 38.Aarav has a ribbon 4/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 1/2 litre of juice. Diya drinks 2/9 litre. How much juice is left (in litres)? =
  40. 40.2/3 − 3/7 =

Answer key

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

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