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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 808 · 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 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  2. 2.1/3 − 1/9 =
  3. 3.Kabir has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  4. 4.6/7 − 3/4 =
  5. 5.A tank is 4/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  6. 6.1/2 − 4/9 =
  7. 7.4/9 − 1/6 =
  8. 8.A bottle has 5/6 litre of juice. Kabir drinks 7/9 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 8/9 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  10. 10.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  11. 11.Arjun has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  12. 12.3/10 − 1/5 =
  13. 13.Aarav has a ribbon 2/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  14. 14.A bottle has 4/5 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  15. 15.A bottle has 7/8 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  16. 16.Tara has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  17. 17.Aarav has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  18. 18.1/4 − 1/6 =
  19. 19.A bottle has 3/5 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  20. 20.3/7 − 1/3 =
  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. 22.6/7 − 2/3 =
  23. 23.A bottle has 7/9 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  24. 24.1/2 − 3/7 =
  25. 25.1/2 − 2/5 =
  26. 26.3/5 − 1/2 =
  27. 27.8/9 − 5/6 =
  28. 28.3/8 − 1/3 =
  29. 29.5/7 − 2/3 =
  30. 30.5/9 − 1/6 =
  31. 31.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  32. 32.Aarav has a ribbon 3/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  33. 33.3/8 − 1/6 =
  34. 34.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? =
  35. 35.1/2 − 2/7 =
  36. 36.5/6 − 1/8 =
  37. 37.4/7 − 1/3 =
  38. 38.Kabir has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  39. 39.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  40. 40.2/3 − 1/5 =

Answer key

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

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