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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 527 · 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. 1.4/5 − 3/10 =
  2. 2.Vihaan has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  3. 3.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  4. 4.2/3 − 1/8 =
  5. 5.A bottle has 1/3 litre of juice. Tara drinks 1/10 litre. How much juice is left (in litres)? =
  6. 6.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  7. 7.5/6 − 3/8 =
  8. 8.1/2 − 1/8 =
  9. 9.A tank is 1/2 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  10. 10.A bottle has 1/2 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  11. 11.5/7 − 1/2 =
  12. 12.Ishaan has a ribbon 2/3 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  13. 13.A bottle has 3/4 litre of juice. Riya drinks 7/10 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 5/6 litre of juice. Vihaan drinks 1/9 litre. How much juice is left (in litres)? =
  15. 15.6/7 − 1/2 =
  16. 16.A tank is 5/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  17. 17.A tank is 4/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  18. 18.A bottle has 5/7 litre of juice. Rohan drinks 1/2 litre. How much juice is left (in litres)? =
  19. 19.3/8 − 1/3 =
  20. 20.Ishaan has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  21. 21.1/3 − 3/10 =
  22. 22.8/9 − 5/6 =
  23. 23.Arjun has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  24. 24.A tank is 7/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  25. 25.Arjun has a ribbon 5/6 m long and cuts off 7/9 m. How long is the ribbon now (in m)? =
  26. 26.Anaya has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  27. 27.1/4 − 1/8 =
  28. 28.A tank is 5/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  29. 29.1/3 − 1/5 =
  30. 30.4/7 − 1/2 =
  31. 31.Diya has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  32. 32.Vihaan has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  33. 33.5/8 − 1/3 =
  34. 34.A bottle has 2/5 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 4/7 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  36. 36.A tank is 1/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  37. 37.Aarav has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  38. 38.A tank is 4/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  39. 39.3/8 − 1/6 =
  40. 40.A bottle has 2/5 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =

Answer key

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

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