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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 963 · 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. 1.2/5 − 1/3 =
  2. 2.Tara has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 1/6 litre of juice. Rohan drinks 1/9 litre. How much juice is left (in litres)? =
  4. 4.3/4 − 7/10 =
  5. 5.A bottle has 2/9 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  6. 6.1/3 − 1/5 =
  7. 7.A bottle has 7/10 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  8. 8.4/9 − 1/6 =
  9. 9.A tank is 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  10. 10.A bottle has 5/6 litre of juice. Aarav drinks 3/4 litre. How much juice is left (in litres)? =
  11. 11.Ishaan has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  12. 12.1/2 − 1/7 =
  13. 13.A bottle has 1/6 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =
  14. 14.4/5 − 1/10 =
  15. 15.Aarav has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  16. 16.2/3 − 2/9 =
  17. 17.A bottle has 3/5 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  18. 18.6/7 − 1/4 =
  19. 19.A bottle has 2/3 litre of juice. Anaya drinks 2/7 litre. How much juice is left (in litres)? =
  20. 20.1/4 − 1/7 =
  21. 21.A bottle has 6/7 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  22. 22.A bottle has 5/7 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 1/2 litre of juice. Sara drinks 3/7 litre. How much juice is left (in litres)? =
  24. 24.5/7 − 1/3 =
  25. 25.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? =
  26. 26.2/5 − 1/10 =
  27. 27.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  28. 28.9/10 − 1/5 =
  29. 29.9/10 − 3/5 =
  30. 30.A tank is 5/6 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  31. 31.5/6 − 1/10 =
  32. 32.1/2 − 2/9 =
  33. 33.A tank is 5/6 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  34. 34.5/7 − 1/4 =
  35. 35.A bottle has 3/4 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 5/6 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  37. 37.Anaya has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  38. 38.1/2 − 1/4 =
  39. 39.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  40. 40.1/2 − 3/8 =

Answer key

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

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