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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 719 · 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 − 5/8 =
  2. 2.A bottle has 9/10 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  3. 3.5/6 − 5/9 =
  4. 4.A bottle has 3/4 litre of juice. Vihaan drinks 3/5 litre. How much juice is left (in litres)? =
  5. 5.2/3 − 5/9 =
  6. 6.1/2 − 3/7 =
  7. 7.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  8. 8.A bottle has 7/9 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  9. 9.8/9 − 1/2 =
  10. 10.A bottle has 7/9 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  11. 11.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  12. 12.A bottle has 5/8 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  13. 13.5/6 − 1/9 =
  14. 14.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? =
  15. 15.2/5 − 1/10 =
  16. 16.A bottle has 9/10 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  17. 17.3/8 − 1/4 =
  18. 18.Arjun has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  19. 19.Ishaan has a ribbon 5/6 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  20. 20.A bottle has 3/4 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  21. 21.Meera has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 4/5 litre of juice. Tara drinks 2/3 litre. How much juice is left (in litres)? =
  23. 23.5/9 − 1/3 =
  24. 24.Ishaan has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  25. 25.1/2 − 1/6 =
  26. 26.Rohan has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  27. 27.5/6 − 1/8 =
  28. 28.5/7 − 1/3 =
  29. 29.Rohan has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  30. 30.A bottle has 1/3 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  31. 31.7/9 − 1/6 =
  32. 32.Tara has a ribbon 5/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  33. 33.1/2 − 3/8 =
  34. 34.3/4 − 1/7 =
  35. 35.3/4 − 3/7 =
  36. 36.5/8 − 1/3 =
  37. 37.1/3 − 2/9 =
  38. 38.Sara has a ribbon 4/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 2/3 litre of juice. Diya drinks 1/9 litre. How much juice is left (in litres)? =
  40. 40.A tank is 1/2 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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