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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 268 · 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. 1.5/8 − 1/2 =
  2. 2.A bottle has 1/4 litre of juice. Sara drinks 1/8 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 1/3 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =
  4. 4.Kabir has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  5. 5.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  6. 6.5/6 − 1/5 =
  7. 7.A tank is 7/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  8. 8.5/6 − 7/9 =
  9. 9.A bottle has 4/5 litre of juice. Arjun drinks 1/10 litre. How much juice is left (in litres)? =
  10. 10.A bottle has 9/10 litre of juice. Anaya drinks 3/5 litre. How much juice is left (in litres)? =
  11. 11.Aarav has a ribbon 4/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  12. 12.1/6 − 1/9 =
  13. 13.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  14. 14.A tank is 1/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  15. 15.Vihaan has a ribbon 9/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  16. 16.6/7 − 1/4 =
  17. 17.A bottle has 3/7 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.A bottle has 2/3 litre of juice. Rohan drinks 2/5 litre. How much juice is left (in litres)? =
  19. 19.1/3 − 1/9 =
  20. 20.3/4 − 5/8 =
  21. 21.1/2 − 1/9 =
  22. 22.3/4 − 1/10 =
  23. 23.4/7 − 1/3 =
  24. 24.3/4 − 1/8 =
  25. 25.A tank is 1/4 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  26. 26.Arjun has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  27. 27.1/2 − 1/8 =
  28. 28.Sara has a ribbon 4/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  29. 29.A tank is 3/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  30. 30.1/3 − 1/8 =
  31. 31.A tank is 5/6 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  32. 32.A tank is 3/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  33. 33.1/2 − 1/7 =
  34. 34.A tank is 7/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  35. 35.5/6 − 3/5 =
  36. 36.Aarav has a ribbon 5/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  37. 37.2/3 − 5/8 =
  38. 38.A bottle has 3/4 litre of juice. Anaya drinks 3/5 litre. How much juice is left (in litres)? =
  39. 39.A bottle has 3/5 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  40. 40.A bottle has 8/9 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =

Answer key

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

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