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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 27 · 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. 1.1/4 − 1/7 =
  2. 2.Ishaan has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  3. 3.5/9 − 1/2 =
  4. 4.5/8 − 1/4 =
  5. 5.1/6 − 1/8 =
  6. 6.1/2 − 1/8 =
  7. 7.A tank is 3/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  8. 8.5/6 − 3/8 =
  9. 9.2/3 − 1/5 =
  10. 10.A bottle has 5/7 litre of juice. Arjun drinks 2/3 litre. How much juice is left (in litres)? =
  11. 11.A tank is 1/2 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  12. 12.A tank is 3/4 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  13. 13.3/4 − 2/7 =
  14. 14.A tank is 2/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  15. 15.Arjun has a ribbon 1/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  16. 16.A bottle has 7/8 litre of juice. Riya drinks 5/6 litre. How much juice is left (in litres)? =
  17. 17.Meera has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  18. 18.4/5 − 1/2 =
  19. 19.6/7 − 2/3 =
  20. 20.1/5 − 1/10 =
  21. 21.5/6 − 1/4 =
  22. 22.3/4 − 1/5 =
  23. 23.Riya has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  24. 24.7/10 − 2/3 =
  25. 25.2/7 − 1/4 =
  26. 26.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? =
  27. 27.7/8 − 1/3 =
  28. 28.3/4 − 1/3 =
  29. 29.2/5 − 3/10 =
  30. 30.Aarav has a ribbon 1/2 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  31. 31.4/7 − 1/2 =
  32. 32.2/3 − 1/2 =
  33. 33.Meera has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  34. 34.7/9 − 1/2 =
  35. 35.Meera has a ribbon 1/2 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  36. 36.2/9 − 1/6 =
  37. 37.Diya has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 7/8 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  39. 39.Rohan has a ribbon 3/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  40. 40.1/2 − 2/9 =

Answer key

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

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