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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 567 · 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. 1.5/8 − 1/3 =
  2. 2.3/8 − 1/4 =
  3. 3.5/9 − 1/3 =
  4. 4.A tank is 9/10 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  5. 5.Riya has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  6. 6.9/10 − 3/5 =
  7. 7.A tank is 9/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  8. 8.A tank is 4/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  9. 9.A bottle has 7/10 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  10. 10.2/3 − 1/9 =
  11. 11.Rohan has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  12. 12.Diya has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  13. 13.1/2 − 3/8 =
  14. 14.A tank is 2/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  15. 15.A tank is 6/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  16. 16.1/6 − 1/9 =
  17. 17.7/10 − 3/5 =
  18. 18.Kabir has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  19. 19.1/3 − 1/10 =
  20. 20.1/2 − 3/7 =
  21. 21.Anaya has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 1/3 litre of juice. Tara drinks 1/7 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 9/10 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  24. 24.4/5 − 2/3 =
  25. 25.Ishaan has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  26. 26.Tara has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  27. 27.5/6 − 4/9 =
  28. 28.7/9 − 1/6 =
  29. 29.9/10 − 3/4 =
  30. 30.A bottle has 4/7 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.5/8 − 1/2 =
  32. 32.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? =
  33. 33.Riya has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  34. 34.5/7 − 2/3 =
  35. 35.7/9 − 1/3 =
  36. 36.A tank is 1/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  37. 37.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? =
  38. 38.3/4 − 2/5 =
  39. 39.3/5 − 3/10 =
  40. 40.3/4 − 5/7 =

Answer key

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

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