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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 642 · 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.Rohan has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  2. 2.Anaya has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  3. 3.9/10 − 3/5 =
  4. 4.A bottle has 5/8 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  5. 5.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? =
  6. 6.Kabir has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  7. 7.5/6 − 7/10 =
  8. 8.4/9 − 1/6 =
  9. 9.3/8 − 1/4 =
  10. 10.4/7 − 1/4 =
  11. 11.5/6 − 1/9 =
  12. 12.4/5 − 1/10 =
  13. 13.1/3 − 1/7 =
  14. 14.4/7 − 1/2 =
  15. 15.A bottle has 5/9 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  16. 16.5/6 − 7/9 =
  17. 17.9/10 − 1/5 =
  18. 18.5/8 − 1/6 =
  19. 19.5/6 − 3/8 =
  20. 20.Ishaan has a ribbon 8/9 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  21. 21.A tank is 1/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  22. 22.1/2 − 3/10 =
  23. 23.7/10 − 1/4 =
  24. 24.3/4 − 1/2 =
  25. 25.1/3 − 3/10 =
  26. 26.5/6 − 2/9 =
  27. 27.3/4 − 7/10 =
  28. 28.3/4 − 2/3 =
  29. 29.2/3 − 2/7 =
  30. 30.3/4 − 5/8 =
  31. 31.1/3 − 1/4 =
  32. 32.Meera has a ribbon 8/9 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  33. 33.Aarav has a ribbon 7/10 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  34. 34.4/5 − 1/4 =
  35. 35.7/10 − 1/6 =
  36. 36.A bottle has 2/3 litre of juice. Riya drinks 1/10 litre. How much juice is left (in litres)? =
  37. 37.2/5 − 1/6 =
  38. 38.A bottle has 4/9 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  39. 39.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  40. 40.8/9 − 2/3 =

Answer key

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

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