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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 424 · 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.Ishaan has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  2. 2.A tank is 7/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  3. 3.A bottle has 8/9 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  4. 4.A tank is 2/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  5. 5.7/8 − 1/3 =
  6. 6.A bottle has 3/5 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  7. 7.Aarav has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  8. 8.1/2 − 1/7 =
  9. 9.3/10 − 1/6 =
  10. 10.A bottle has 3/4 litre of juice. Kabir drinks 2/5 litre. How much juice is left (in litres)? =
  11. 11.3/8 − 1/4 =
  12. 12.3/4 − 7/10 =
  13. 13.A bottle has 1/3 litre of juice. Rohan drinks 2/9 litre. How much juice is left (in litres)? =
  14. 14.3/4 − 5/8 =
  15. 15.1/6 − 1/10 =
  16. 16.Anaya has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  17. 17.2/3 − 3/10 =
  18. 18.Diya has a ribbon 9/10 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  19. 19.A tank is 7/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  20. 20.1/2 − 2/7 =
  21. 21.7/10 − 1/3 =
  22. 22.5/8 − 1/2 =
  23. 23.2/3 − 3/7 =
  24. 24.A bottle has 7/10 litre of juice. Riya drinks 3/5 litre. How much juice is left (in litres)? =
  25. 25.Diya has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  26. 26.Rohan has a ribbon 1/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  27. 27.6/7 − 1/4 =
  28. 28.A bottle has 2/3 litre of juice. Diya drinks 4/9 litre. How much juice is left (in litres)? =
  29. 29.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  30. 30.Meera has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  31. 31.A bottle has 3/5 litre of juice. Anaya drinks 3/10 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 2/7 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.1/6 − 1/8 =
  34. 34.Diya has a ribbon 3/4 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  35. 35.4/5 − 1/10 =
  36. 36.3/4 − 1/6 =
  37. 37.5/9 − 1/3 =
  38. 38.A bottle has 5/6 litre of juice. Ishaan drinks 7/10 litre. How much juice is left (in litres)? =
  39. 39.A tank is 5/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  40. 40.2/5 − 1/6 =

Answer key

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

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