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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 250 · 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 5/6 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  2. 2.1/4 − 1/6 =
  3. 3.2/9 − 1/6 =
  4. 4.1/3 − 1/6 =
  5. 5.2/3 − 4/9 =
  6. 6.A tank is 1/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  7. 7.6/7 − 1/4 =
  8. 8.5/9 − 1/2 =
  9. 9.3/8 − 1/6 =
  10. 10.7/9 − 1/2 =
  11. 11.Diya has a ribbon 3/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  12. 12.1/3 − 1/4 =
  13. 13.1/3 − 1/9 =
  14. 14.A bottle has 1/3 litre of juice. Rohan drinks 1/7 litre. How much juice is left (in litres)? =
  15. 15.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  16. 16.A bottle has 2/3 litre of juice. Meera drinks 1/10 litre. How much juice is left (in litres)? =
  17. 17.1/4 − 1/10 =
  18. 18.A tank is 1/2 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  19. 19.A bottle has 1/3 litre of juice. Sara drinks 1/10 litre. How much juice is left (in litres)? =
  20. 20.2/3 − 3/7 =
  21. 21.Kabir has a ribbon 1/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  22. 22.6/7 − 1/3 =
  23. 23.1/3 − 1/5 =
  24. 24.2/3 − 2/9 =
  25. 25.5/7 − 1/4 =
  26. 26.A bottle has 7/9 litre of juice. Diya drinks 2/3 litre. How much juice is left (in litres)? =
  27. 27.9/10 − 2/5 =
  28. 28.5/6 − 4/9 =
  29. 29.Riya has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  30. 30.Arjun has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  31. 31.1/2 − 1/7 =
  32. 32.4/7 − 1/4 =
  33. 33.3/10 − 1/4 =
  34. 34.2/5 − 3/10 =
  35. 35.Riya has a ribbon 3/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  36. 36.1/3 − 1/8 =
  37. 37.A tank is 1/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  38. 38.Kabir has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  39. 39.2/3 − 5/8 =
  40. 40.A bottle has 1/3 litre of juice. Arjun drinks 1/8 litre. How much juice is left (in litres)? =

Answer key

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

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