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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 389 · 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. 1.7/8 − 2/3 =
  2. 2.2/3 − 1/9 =
  3. 3.5/8 − 1/3 =
  4. 4.5/7 − 1/3 =
  5. 5.Vihaan has a ribbon 4/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  6. 6.1/2 − 3/8 =
  7. 7.7/9 − 1/6 =
  8. 8.A bottle has 3/4 litre of juice. Vihaan drinks 2/7 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 5/9 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  10. 10.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? =
  11. 11.A bottle has 8/9 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  12. 12.3/4 − 2/7 =
  13. 13.1/3 − 1/9 =
  14. 14.Diya has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  15. 15.A bottle has 4/5 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  16. 16.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? =
  17. 17.A tank is 1/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  18. 18.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? =
  19. 19.A bottle has 4/5 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  20. 20.5/9 − 1/3 =
  21. 21.1/6 − 1/8 =
  22. 22.A bottle has 4/7 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  23. 23.2/3 − 2/5 =
  24. 24.Tara has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  25. 25.9/10 − 1/2 =
  26. 26.A bottle has 4/5 litre of juice. Kabir drinks 3/4 litre. How much juice is left (in litres)? =
  27. 27.5/6 − 2/5 =
  28. 28.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  29. 29.7/10 − 1/2 =
  30. 30.5/7 − 1/4 =
  31. 31.Kabir has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  32. 32.A tank is 5/6 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  33. 33.1/2 − 4/9 =
  34. 34.A bottle has 6/7 litre of juice. Arjun drinks 3/4 litre. How much juice is left (in litres)? =
  35. 35.Sara has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  36. 36.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  37. 37.A bottle has 5/9 litre of juice. Rohan drinks 1/2 litre. How much juice is left (in litres)? =
  38. 38.2/9 − 1/6 =
  39. 39.Kabir has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  40. 40.Sara has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =

Answer key

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

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