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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 957 · 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.Vihaan has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  2. 2.7/8 − 1/3 =
  3. 3.9/10 − 1/4 =
  4. 4.A bottle has 2/3 litre of juice. Vihaan drinks 3/5 litre. How much juice is left (in litres)? =
  5. 5.5/6 − 3/10 =
  6. 6.A bottle has 1/2 litre of juice. Rohan drinks 1/9 litre. How much juice is left (in litres)? =
  7. 7.1/3 − 1/5 =
  8. 8.7/8 − 1/6 =
  9. 9.3/10 − 1/4 =
  10. 10.1/4 − 1/5 =
  11. 11.2/3 − 1/9 =
  12. 12.6/7 − 1/4 =
  13. 13.Anaya has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  14. 14.3/8 − 1/6 =
  15. 15.Sara has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  16. 16.Kabir has a ribbon 5/6 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 5/9 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  18. 18.Kabir has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  19. 19.2/3 − 5/9 =
  20. 20.5/6 − 5/8 =
  21. 21.1/2 − 4/9 =
  22. 22.Kabir has a ribbon 1/2 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  23. 23.1/2 − 1/8 =
  24. 24.1/3 − 1/7 =
  25. 25.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? =
  26. 26.A bottle has 3/8 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  27. 27.Kabir has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 5/6 litre of juice. Aarav drinks 5/9 litre. How much juice is left (in litres)? =
  29. 29.9/10 − 1/5 =
  30. 30.2/3 − 5/8 =
  31. 31.3/10 − 1/6 =
  32. 32.5/6 − 4/9 =
  33. 33.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  34. 34.A bottle has 1/3 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  35. 35.2/3 − 3/5 =
  36. 36.7/10 − 1/4 =
  37. 37.9/10 − 1/2 =
  38. 38.Kabir has a ribbon 9/10 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  39. 39.A tank is 9/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  40. 40.5/6 − 1/8 =

Answer key

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

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