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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 477 · 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 2/3 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  2. 2.A tank is 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  3. 3.Meera has a ribbon 2/3 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  4. 4.1/5 − 1/10 =
  5. 5.5/7 − 1/2 =
  6. 6.6/7 − 2/3 =
  7. 7.A bottle has 9/10 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  8. 8.Meera has a ribbon 7/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  9. 9.Anaya has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  10. 10.3/4 − 1/8 =
  11. 11.A bottle has 3/7 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  12. 12.A bottle has 1/2 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =
  13. 13.A tank is 2/3 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  14. 14.9/10 − 3/4 =
  15. 15.Anaya has a ribbon 1/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  16. 16.A tank is 2/3 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  17. 17.A bottle has 2/5 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  18. 18.Anaya has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  19. 19.3/4 − 2/3 =
  20. 20.3/4 − 3/7 =
  21. 21.A bottle has 2/3 litre of juice. Vihaan drinks 5/9 litre. How much juice is left (in litres)? =
  22. 22.A tank is 9/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  23. 23.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? =
  24. 24.A bottle has 7/9 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  25. 25.A tank is 5/6 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  26. 26.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  27. 27.1/6 − 1/10 =
  28. 28.A bottle has 1/2 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =
  29. 29.1/3 − 1/9 =
  30. 30.Meera has a ribbon 2/3 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  31. 31.A tank is 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  32. 32.1/3 − 2/9 =
  33. 33.A bottle has 4/9 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  34. 34.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? =
  35. 35.A bottle has 7/8 litre of juice. Rohan drinks 5/6 litre. How much juice is left (in litres)? =
  36. 36.A tank is 1/6 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  37. 37.A tank is 4/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  38. 38.Ishaan has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  39. 39.1/3 − 1/7 =
  40. 40.A bottle has 7/8 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =

Answer key

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

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