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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 636 · 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.A bottle has 4/5 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  2. 2.1/4 − 1/5 =
  3. 3.1/3 − 1/9 =
  4. 4.1/2 − 1/8 =
  5. 5.A bottle has 1/6 litre of juice. Tara drinks 1/8 litre. How much juice is left (in litres)? =
  6. 6.5/8 − 1/3 =
  7. 7.3/4 − 3/7 =
  8. 8.3/4 − 2/7 =
  9. 9.7/8 − 1/3 =
  10. 10.A bottle has 3/4 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  11. 11.8/9 − 2/3 =
  12. 12.A bottle has 3/5 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  13. 13.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? =
  14. 14.1/3 − 1/7 =
  15. 15.A bottle has 6/7 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  16. 16.4/9 − 1/3 =
  17. 17.1/5 − 1/6 =
  18. 18.A bottle has 1/3 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  19. 19.2/3 − 1/9 =
  20. 20.A bottle has 2/3 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  21. 21.Sara has a ribbon 4/5 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  22. 22.A tank is 6/7 full of water. Then water filling 1/4 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 1/4 of the tank is used. What fraction of the tank is full now? =
  24. 24.A bottle has 5/6 litre of juice. Arjun drinks 1/9 litre. How much juice is left (in litres)? =
  25. 25.6/7 − 3/4 =
  26. 26.5/9 − 1/3 =
  27. 27.A bottle has 4/5 litre of juice. Vihaan drinks 1/10 litre. How much juice is left (in litres)? =
  28. 28.7/9 − 1/6 =
  29. 29.2/3 − 3/8 =
  30. 30.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  31. 31.9/10 − 1/3 =
  32. 32.4/7 − 1/3 =
  33. 33.Arjun has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  34. 34.A tank is 1/2 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  35. 35.A bottle has 8/9 litre of juice. Diya drinks 5/6 litre. How much juice is left (in litres)? =
  36. 36.A tank is 7/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  37. 37.1/2 − 1/9 =
  38. 38.A bottle has 7/10 litre of juice. Meera drinks 3/5 litre. How much juice is left (in litres)? =
  39. 39.3/4 − 1/10 =
  40. 40.2/7 − 1/4 =

Answer key

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

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