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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 38 · 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. 1.5/6 − 4/9 =
  2. 2.A bottle has 3/4 litre of juice. Ishaan drinks 3/8 litre. How much juice is left (in litres)? =
  3. 3.Riya has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  4. 4.3/4 − 1/10 =
  5. 5.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  6. 6.Sara has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  7. 7.Aarav has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  8. 8.5/9 − 1/3 =
  9. 9.6/7 − 1/3 =
  10. 10.5/8 − 1/4 =
  11. 11.9/10 − 1/4 =
  12. 12.A bottle has 7/9 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  13. 13.Diya has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  14. 14.2/3 − 1/9 =
  15. 15.A bottle has 1/4 litre of juice. Diya drinks 1/7 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 1/6 litre of juice. Anaya drinks 1/8 litre. How much juice is left (in litres)? =
  17. 17.9/10 − 5/6 =
  18. 18.9/10 − 3/4 =
  19. 19.A bottle has 3/4 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  20. 20.3/4 − 4/7 =
  21. 21.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  22. 22.5/6 − 4/5 =
  23. 23.3/4 − 1/7 =
  24. 24.3/7 − 1/4 =
  25. 25.Riya has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  26. 26.Tara has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  27. 27.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  28. 28.Ishaan has a ribbon 7/8 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  29. 29.Sara has a ribbon 5/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  30. 30.3/5 − 1/6 =
  31. 31.A tank is 4/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  32. 32.Sara has a ribbon 1/2 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  33. 33.3/5 − 1/10 =
  34. 34.Ishaan has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  35. 35.1/6 − 1/10 =
  36. 36.4/7 − 1/4 =
  37. 37.3/8 − 1/3 =
  38. 38.Arjun has a ribbon 5/6 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 5/9 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  40. 40.Rohan has a ribbon 5/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =

Answer key

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

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