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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 821 · 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. 1.7/9 − 2/3 =
  2. 2.Riya has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 1/2 litre of juice. Rohan drinks 1/7 litre. How much juice is left (in litres)? =
  4. 4.Arjun has a ribbon 5/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  5. 5.Anaya has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  6. 6.1/3 − 1/7 =
  7. 7.5/7 − 1/3 =
  8. 8.A bottle has 5/6 litre of juice. Diya drinks 4/9 litre. How much juice is left (in litres)? =
  9. 9.Riya has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  10. 10.3/4 − 3/10 =
  11. 11.1/3 − 1/8 =
  12. 12.4/5 − 3/4 =
  13. 13.3/4 − 1/5 =
  14. 14.Rohan has a ribbon 5/6 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  15. 15.A bottle has 1/2 litre of juice. Vihaan drinks 2/7 litre. How much juice is left (in litres)? =
  16. 16.7/10 − 1/3 =
  17. 17.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? =
  18. 18.6/7 − 3/4 =
  19. 19.Arjun has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  20. 20.6/7 − 1/2 =
  21. 21.Aarav has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  22. 22.7/10 − 3/5 =
  23. 23.7/8 − 3/4 =
  24. 24.2/3 − 1/10 =
  25. 25.5/6 − 1/9 =
  26. 26.6/7 − 1/4 =
  27. 27.A tank is 7/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  28. 28.4/5 − 1/4 =
  29. 29.1/4 − 1/5 =
  30. 30.1/6 − 1/9 =
  31. 31.9/10 − 4/5 =
  32. 32.Anaya has a ribbon 3/4 m long and cuts off 5/7 m. How long is the ribbon now (in m)? =
  33. 33.1/2 − 3/7 =
  34. 34.3/7 − 1/3 =
  35. 35.A tank is 5/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  36. 36.Arjun has a ribbon 1/2 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 2/3 litre of juice. Arjun drinks 1/7 litre. How much juice is left (in litres)? =
  38. 38.A bottle has 3/4 litre of juice. Arjun drinks 1/10 litre. How much juice is left (in litres)? =
  39. 39.A tank is 3/4 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  40. 40.5/6 − 1/4 =

Answer key

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

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