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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 422 · 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. 1.3/4 − 1/2 =
  2. 2.1/2 − 3/10 =
  3. 3.5/8 − 1/6 =
  4. 4.9/10 − 3/5 =
  5. 5.A bottle has 3/8 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  6. 6.5/7 − 1/2 =
  7. 7.2/3 − 3/8 =
  8. 8.A tank is 3/4 full of water. Then water filling 5/7 of the tank is used. What fraction of the tank is full now? =
  9. 9.Kabir has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  10. 10.Arjun has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  11. 11.2/3 − 2/5 =
  12. 12.1/6 − 1/9 =
  13. 13.3/10 − 1/6 =
  14. 14.5/6 − 1/8 =
  15. 15.A bottle has 7/10 litre of juice. Meera drinks 3/5 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 4/7 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  17. 17.3/8 − 1/3 =
  18. 18.A tank is 2/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  19. 19.8/9 − 1/6 =
  20. 20.A bottle has 5/7 litre of juice. Ishaan drinks 2/3 litre. How much juice is left (in litres)? =
  21. 21.5/6 − 5/9 =
  22. 22.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? =
  23. 23.A tank is 7/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  24. 24.A bottle has 1/5 litre of juice. Kabir drinks 1/10 litre. How much juice is left (in litres)? =
  25. 25.4/5 − 3/10 =
  26. 26.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  27. 27.5/6 − 1/9 =
  28. 28.A bottle has 5/9 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  29. 29.5/6 − 2/5 =
  30. 30.3/4 − 1/10 =
  31. 31.A bottle has 5/6 litre of juice. Arjun drinks 7/10 litre. How much juice is left (in litres)? =
  32. 32.Aarav has a ribbon 1/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  33. 33.A bottle has 5/7 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  34. 34.A bottle has 4/5 litre of juice. Diya drinks 7/10 litre. How much juice is left (in litres)? =
  35. 35.1/3 − 1/9 =
  36. 36.2/3 − 1/8 =
  37. 37.A bottle has 1/3 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  38. 38.Diya has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 1/3 litre of juice. Ishaan drinks 1/8 litre. How much juice is left (in litres)? =
  40. 40.3/7 − 1/3 =

Answer key

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

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