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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 167 · 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. 1.3/8 − 1/4 =
  2. 2.Anaya has a ribbon 5/6 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  3. 3.3/4 − 5/7 =
  4. 4.5/9 − 1/2 =
  5. 5.Meera has a ribbon 3/4 m long and cuts off 5/7 m. How long is the ribbon now (in m)? =
  6. 6.3/5 − 1/2 =
  7. 7.5/9 − 1/3 =
  8. 8.9/10 − 1/4 =
  9. 9.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  10. 10.1/2 − 1/3 =
  11. 11.A tank is 3/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  12. 12.5/6 − 3/5 =
  13. 13.A bottle has 3/5 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  14. 14.1/3 − 3/10 =
  15. 15.7/8 − 1/3 =
  16. 16.4/5 − 3/4 =
  17. 17.Tara has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  18. 18.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? =
  19. 19.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  20. 20.3/4 − 1/8 =
  21. 21.Sara has a ribbon 5/6 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  22. 22.1/3 − 1/9 =
  23. 23.6/7 − 1/4 =
  24. 24.Tara has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  25. 25.1/3 − 1/8 =
  26. 26.1/2 − 1/8 =
  27. 27.Anaya has a ribbon 7/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  28. 28.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  29. 29.5/6 − 1/4 =
  30. 30.A bottle has 2/5 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  31. 31.3/4 − 5/8 =
  32. 32.Anaya has a ribbon 5/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  33. 33.A bottle has 3/4 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  34. 34.A tank is 9/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  35. 35.A bottle has 5/8 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  36. 36.7/8 − 1/2 =
  37. 37.1/2 − 1/5 =
  38. 38.Anaya has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  39. 39.3/4 − 1/7 =
  40. 40.A bottle has 8/9 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =

Answer key

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

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