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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 528 · 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 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? =
  2. 2.1/6 − 1/9 =
  3. 3.6/7 − 1/4 =
  4. 4.5/6 − 2/3 =
  5. 5.5/6 − 3/5 =
  6. 6.Sara has a ribbon 3/4 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  7. 7.A bottle has 1/5 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  8. 8.Meera has a ribbon 5/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  9. 9.5/6 − 1/3 =
  10. 10.7/8 − 2/3 =
  11. 11.A tank is 7/8 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  12. 12.Ishaan has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  13. 13.1/3 − 1/9 =
  14. 14.3/4 − 1/7 =
  15. 15.A bottle has 1/4 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  16. 16.3/4 − 3/5 =
  17. 17.1/2 − 1/7 =
  18. 18.Diya has a ribbon 1/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  19. 19.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  20. 20.2/3 − 5/9 =
  21. 21.5/7 − 1/2 =
  22. 22.Aarav has a ribbon 7/8 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  23. 23.5/6 − 5/8 =
  24. 24.8/9 − 5/6 =
  25. 25.A bottle has 5/8 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  26. 26.A bottle has 9/10 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  27. 27.A bottle has 1/2 litre of juice. Aarav drinks 2/9 litre. How much juice is left (in litres)? =
  28. 28.7/9 − 2/3 =
  29. 29.4/7 − 1/4 =
  30. 30.1/2 − 3/10 =
  31. 31.7/9 − 1/3 =
  32. 32.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  33. 33.A bottle has 1/4 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  34. 34.Anaya has a ribbon 1/2 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  35. 35.A bottle has 3/5 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 5/9 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  37. 37.A bottle has 5/7 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  38. 38.A bottle has 7/8 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  39. 39.1/2 − 1/4 =
  40. 40.2/3 − 5/8 =

Answer key

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

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