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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 231 · 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. 1.5/8 − 1/6 =
  2. 2.1/3 − 1/10 =
  3. 3.A bottle has 2/3 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 5/6 litre of juice. Aarav drinks 4/9 litre. How much juice is left (in litres)? =
  5. 5.Ishaan has a ribbon 1/2 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  6. 6.A tank is 2/3 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  7. 7.A bottle has 2/3 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  8. 8.Riya has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  9. 9.8/9 − 1/2 =
  10. 10.A tank is 3/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  11. 11.7/10 − 1/3 =
  12. 12.2/3 − 4/9 =
  13. 13.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? =
  14. 14.Tara has a ribbon 7/8 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  15. 15.5/6 − 3/4 =
  16. 16.1/3 − 1/4 =
  17. 17.2/3 − 1/7 =
  18. 18.3/7 − 1/3 =
  19. 19.5/6 − 1/8 =
  20. 20.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? =
  21. 21.A bottle has 1/2 litre of juice. Sara drinks 1/7 litre. How much juice is left (in litres)? =
  22. 22.5/7 − 1/2 =
  23. 23.4/9 − 1/6 =
  24. 24.2/3 − 1/8 =
  25. 25.7/9 − 1/3 =
  26. 26.4/5 − 1/10 =
  27. 27.3/4 − 3/10 =
  28. 28.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  29. 29.5/7 − 1/4 =
  30. 30.A tank is 7/8 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  31. 31.Anaya 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 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  33. 33.A bottle has 4/5 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  34. 34.2/3 − 4/7 =
  35. 35.5/6 − 4/9 =
  36. 36.3/5 − 1/3 =
  37. 37.A tank is 3/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  38. 38.7/8 − 1/2 =
  39. 39.A bottle has 5/9 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  40. 40.1/2 − 4/9 =

Answer key

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

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