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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 462 · 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.Vihaan has a ribbon 7/8 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  2. 2.A bottle has 4/5 litre of juice. Ishaan drinks 3/10 litre. How much juice is left (in litres)? =
  3. 3.2/9 − 1/6 =
  4. 4.6/7 − 1/4 =
  5. 5.A bottle has 3/4 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  6. 6.3/5 − 1/2 =
  7. 7.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? =
  8. 8.A tank is 5/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  9. 9.Arjun has a ribbon 7/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  10. 10.Meera has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  11. 11.A bottle has 1/2 litre of juice. Vihaan drinks 1/8 litre. How much juice is left (in litres)? =
  12. 12.A bottle has 4/5 litre of juice. Sara drinks 1/10 litre. How much juice is left (in litres)? =
  13. 13.1/2 − 1/7 =
  14. 14.A tank is 1/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  15. 15.2/3 − 3/7 =
  16. 16.A tank is 1/2 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  17. 17.3/8 − 1/3 =
  18. 18.5/8 − 1/3 =
  19. 19.Tara has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  20. 20.A tank is 3/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  21. 21.A tank is 1/3 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  22. 22.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? =
  23. 23.A tank is 2/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  24. 24.A bottle has 1/2 litre of juice. Rohan drinks 2/5 litre. How much juice is left (in litres)? =
  25. 25.4/9 − 1/3 =
  26. 26.A bottle has 9/10 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  27. 27.7/9 − 1/3 =
  28. 28.2/5 − 1/4 =
  29. 29.1/2 − 1/9 =
  30. 30.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? =
  31. 31.Rohan has a ribbon 1/2 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  32. 32.2/7 − 1/4 =
  33. 33.A tank is 5/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  34. 34.1/4 − 1/6 =
  35. 35.1/3 − 1/8 =
  36. 36.Sara has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 2/3 litre of juice. Tara drinks 3/8 litre. How much juice is left (in litres)? =
  38. 38.A bottle has 7/8 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  39. 39.Diya has a ribbon 9/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  40. 40.3/5 − 1/4 =

Answer key

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

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