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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 155 · 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.A tank is 7/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  2. 2.Kabir has a ribbon 5/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  3. 3.A tank is 5/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  4. 4.1/3 − 2/7 =
  5. 5.8/9 − 1/6 =
  6. 6.1/2 − 3/8 =
  7. 7.6/7 − 3/4 =
  8. 8.A bottle has 1/2 litre of juice. Sara drinks 2/7 litre. How much juice is left (in litres)? =
  9. 9.Meera has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  10. 10.Rohan has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  11. 11.1/2 − 2/5 =
  12. 12.Aarav has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  13. 13.2/5 − 1/6 =
  14. 14.5/9 − 1/2 =
  15. 15.5/8 − 1/2 =
  16. 16.5/9 − 1/3 =
  17. 17.Diya has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  18. 18.7/9 − 1/3 =
  19. 19.3/4 − 1/3 =
  20. 20.A bottle has 5/8 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  21. 21.2/3 − 1/7 =
  22. 22.1/3 − 1/4 =
  23. 23.A bottle has 2/3 litre of juice. Diya drinks 1/7 litre. How much juice is left (in litres)? =
  24. 24.5/6 − 7/9 =
  25. 25.9/10 − 1/5 =
  26. 26.A bottle has 6/7 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  27. 27.3/4 − 1/10 =
  28. 28.2/5 − 1/4 =
  29. 29.A bottle has 1/4 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  30. 30.Riya has a ribbon 3/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  31. 31.7/8 − 1/6 =
  32. 32.5/6 − 1/8 =
  33. 33.Arjun has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  34. 34.A bottle has 7/10 litre of juice. Sara drinks 2/3 litre. How much juice is left (in litres)? =
  35. 35.Aarav has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  36. 36.4/7 − 1/3 =
  37. 37.1/3 − 1/9 =
  38. 38.5/6 − 2/3 =
  39. 39.2/3 − 3/8 =
  40. 40.1/2 − 3/7 =

Answer key

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

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