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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 458 · 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.Meera has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  2. 2.5/6 − 1/4 =
  3. 3.5/9 − 1/2 =
  4. 4.A tank is 7/8 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  5. 5.A bottle has 5/7 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  6. 6.Rohan has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  7. 7.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? =
  8. 8.A bottle has 6/7 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  9. 9.A tank is 9/10 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  10. 10.4/9 − 1/6 =
  11. 11.2/3 − 3/5 =
  12. 12.A bottle has 5/6 litre of juice. Ishaan drinks 4/9 litre. How much juice is left (in litres)? =
  13. 13.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  14. 14.Tara has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  15. 15.1/4 − 1/7 =
  16. 16.A bottle has 3/5 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  17. 17.A bottle has 1/4 litre of juice. Meera drinks 1/10 litre. How much juice is left (in litres)? =
  18. 18.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  19. 19.A tank is 9/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  20. 20.2/3 − 3/8 =
  21. 21.5/9 − 1/6 =
  22. 22.A tank is 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  23. 23.2/7 − 1/4 =
  24. 24.A tank is 4/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  25. 25.Aarav has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  26. 26.A tank is 1/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  27. 27.A tank is 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  28. 28.7/9 − 1/6 =
  29. 29.3/5 − 1/6 =
  30. 30.A tank is 5/6 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  31. 31.Ishaan has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  32. 32.5/6 − 4/5 =
  33. 33.1/3 − 1/4 =
  34. 34.A tank is 3/4 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  35. 35.4/5 − 7/10 =
  36. 36.A bottle has 5/6 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  37. 37.Rohan has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  38. 38.A tank is 5/6 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  39. 39.Kabir has a ribbon 1/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  40. 40.A bottle has 2/7 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =

Answer key

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

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