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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 861 · 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 7/8 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  2. 2.4/5 − 3/10 =
  3. 3.A bottle has 6/7 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  4. 4.A tank is 7/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  5. 5.2/9 − 1/6 =
  6. 6.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? =
  7. 7.A tank is 5/6 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  8. 8.6/7 − 2/3 =
  9. 9.A bottle has 3/4 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =
  10. 10.A bottle has 3/4 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  11. 11.A bottle has 3/5 litre of juice. Riya drinks 1/10 litre. How much juice is left (in litres)? =
  12. 12.7/9 − 1/3 =
  13. 13.7/10 − 2/5 =
  14. 14.5/9 − 1/2 =
  15. 15.2/3 − 4/9 =
  16. 16.3/5 − 1/10 =
  17. 17.4/5 − 1/4 =
  18. 18.A bottle has 5/6 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  19. 19.5/6 − 5/8 =
  20. 20.A tank is 1/3 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  21. 21.3/5 − 1/4 =
  22. 22.Ishaan has a ribbon 1/2 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  23. 23.A bottle has 9/10 litre of juice. Rohan drinks 3/5 litre. How much juice is left (in litres)? =
  24. 24.1/2 − 2/5 =
  25. 25.7/8 − 3/4 =
  26. 26.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  27. 27.1/5 − 1/10 =
  28. 28.Arjun has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  29. 29.4/7 − 1/3 =
  30. 30.9/10 − 4/5 =
  31. 31.Rohan has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  32. 32.3/5 − 3/10 =
  33. 33.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? =
  34. 34.A bottle has 2/3 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =
  35. 35.2/3 − 1/7 =
  36. 36.2/3 − 5/9 =
  37. 37.7/8 − 2/3 =
  38. 38.A tank is 4/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  39. 39.9/10 − 2/5 =
  40. 40.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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