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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 754 · 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 5/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  2. 2.2/3 − 2/9 =
  3. 3.Rohan has a ribbon 3/4 m long and cuts off 5/7 m. How long is the ribbon now (in m)? =
  4. 4.5/6 − 7/9 =
  5. 5.A bottle has 5/6 litre of juice. Rohan drinks 3/4 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 5/6 litre of juice. Meera drinks 1/10 litre. How much juice is left (in litres)? =
  7. 7.5/8 − 1/4 =
  8. 8.2/3 − 1/7 =
  9. 9.7/8 − 1/2 =
  10. 10.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? =
  11. 11.A tank is 3/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  12. 12.Aarav has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  13. 13.5/7 − 1/2 =
  14. 14.1/3 − 1/4 =
  15. 15.A bottle has 3/4 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 1/2 litre of juice. Sara drinks 4/9 litre. How much juice is left (in litres)? =
  17. 17.A bottle has 7/9 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  18. 18.7/9 − 2/3 =
  19. 19.4/5 − 1/4 =
  20. 20.A tank is 3/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  21. 21.2/3 − 3/5 =
  22. 22.Meera has a ribbon 5/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  23. 23.4/5 − 1/10 =
  24. 24.A bottle has 8/9 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  25. 25.3/4 − 1/6 =
  26. 26.A tank is 1/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  27. 27.3/5 − 1/10 =
  28. 28.6/7 − 1/2 =
  29. 29.Sara has a ribbon 5/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  30. 30.3/8 − 1/4 =
  31. 31.4/7 − 1/3 =
  32. 32.A tank is 3/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  33. 33.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? =
  34. 34.A tank is 5/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  35. 35.3/4 − 3/7 =
  36. 36.1/3 − 1/9 =
  37. 37.7/9 − 1/3 =
  38. 38.Ishaan has a ribbon 5/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  39. 39.A tank is 1/2 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  40. 40.Rohan has a ribbon 3/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =

Answer key

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

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