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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 376 · 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 1/2 of the tank is used. What fraction of the tank is full now? =
  2. 2.5/6 − 5/8 =
  3. 3.Vihaan has a ribbon 3/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  4. 4.A tank is 5/6 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  5. 5.Kabir has a ribbon 1/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  6. 6.6/7 − 2/3 =
  7. 7.7/9 − 1/2 =
  8. 8.2/3 − 2/7 =
  9. 9.7/10 − 1/3 =
  10. 10.A bottle has 3/7 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  11. 11.A tank is 8/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  12. 12.1/2 − 3/7 =
  13. 13.2/3 − 5/8 =
  14. 14.7/8 − 1/6 =
  15. 15.9/10 − 1/2 =
  16. 16.Rohan has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 1/3 litre of juice. Anaya drinks 1/9 litre. How much juice is left (in litres)? =
  18. 18.3/5 − 1/6 =
  19. 19.3/4 − 1/8 =
  20. 20.Ishaan has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  21. 21.A tank is 4/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  22. 22.1/3 − 1/7 =
  23. 23.2/3 − 1/7 =
  24. 24.Meera has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  25. 25.4/9 − 1/6 =
  26. 26.6/7 − 1/3 =
  27. 27.1/2 − 1/8 =
  28. 28.A bottle has 1/4 litre of juice. Riya drinks 1/7 litre. How much juice is left (in litres)? =
  29. 29.1/3 − 2/7 =
  30. 30.1/3 − 2/9 =
  31. 31.1/2 − 1/3 =
  32. 32.5/6 − 1/2 =
  33. 33.1/3 − 1/4 =
  34. 34.A bottle has 4/5 litre of juice. Aarav drinks 7/10 litre. How much juice is left (in litres)? =
  35. 35.1/4 − 1/8 =
  36. 36.A bottle has 7/8 litre of juice. Diya drinks 3/4 litre. How much juice is left (in litres)? =
  37. 37.3/4 − 1/3 =
  38. 38.5/8 − 1/3 =
  39. 39.A tank is 3/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  40. 40.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? =

Answer key

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

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