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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 891 · 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 − 7/9 =
  2. 2.1/2 − 3/7 =
  3. 3.A bottle has 2/3 litre of juice. Anaya drinks 3/7 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 5/6 litre of juice. Arjun drinks 1/8 litre. How much juice is left (in litres)? =
  5. 5.A bottle has 1/4 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  6. 6.1/2 − 3/10 =
  7. 7.3/10 − 1/6 =
  8. 8.A bottle has 8/9 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  9. 9.Diya has a ribbon 1/2 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  10. 10.2/3 − 1/5 =
  11. 11.7/8 − 1/4 =
  12. 12.Anaya has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  13. 13.1/2 − 3/8 =
  14. 14.Anaya has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  15. 15.5/6 − 1/5 =
  16. 16.8/9 − 1/6 =
  17. 17.1/2 − 1/7 =
  18. 18.9/10 − 3/4 =
  19. 19.A bottle has 1/4 litre of juice. Riya drinks 1/5 litre. How much juice is left (in litres)? =
  20. 20.A tank is 1/2 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  21. 21.5/6 − 4/5 =
  22. 22.A tank is 3/4 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  23. 23.A tank is 2/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  24. 24.A bottle has 1/2 litre of juice. Rohan drinks 1/9 litre. How much juice is left (in litres)? =
  25. 25.9/10 − 2/3 =
  26. 26.A bottle has 5/8 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  27. 27.A tank is 9/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  28. 28.Ishaan has a ribbon 3/4 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  29. 29.Aarav has a ribbon 2/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  30. 30.9/10 − 1/3 =
  31. 31.4/7 − 1/3 =
  32. 32.6/7 − 1/4 =
  33. 33.2/3 − 3/8 =
  34. 34.3/7 − 1/4 =
  35. 35.A bottle has 7/8 litre of juice. Anaya drinks 2/3 litre. How much juice is left (in litres)? =
  36. 36.1/3 − 1/7 =
  37. 37.3/5 − 1/2 =
  38. 38.Meera has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 3/4 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  40. 40.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? =

Answer key

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

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