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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 595 · 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 − 3/4 =
  2. 2.7/8 − 1/3 =
  3. 3.3/4 − 4/7 =
  4. 4.5/6 − 3/5 =
  5. 5.A bottle has 2/3 litre of juice. Tara drinks 1/7 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 5/6 litre of juice. Rohan drinks 3/8 litre. How much juice is left (in litres)? =
  7. 7.A bottle has 1/3 litre of juice. Arjun drinks 1/9 litre. How much juice is left (in litres)? =
  8. 8.9/10 − 1/6 =
  9. 9.2/3 − 1/8 =
  10. 10.3/5 − 1/6 =
  11. 11.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? =
  12. 12.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  13. 13.5/8 − 1/3 =
  14. 14.1/5 − 1/6 =
  15. 15.2/7 − 1/4 =
  16. 16.A bottle has 3/5 litre of juice. Vihaan drinks 1/10 litre. How much juice is left (in litres)? =
  17. 17.3/5 − 1/2 =
  18. 18.7/8 − 1/6 =
  19. 19.A bottle has 8/9 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  20. 20.A tank is 1/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  21. 21.8/9 − 2/3 =
  22. 22.1/3 − 2/7 =
  23. 23.2/3 − 1/9 =
  24. 24.7/8 − 1/4 =
  25. 25.Anaya has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  26. 26.3/5 − 1/4 =
  27. 27.Aarav has a ribbon 3/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 2/3 litre of juice. Anaya drinks 1/8 litre. How much juice is left (in litres)? =
  29. 29.A bottle has 3/4 litre of juice. Arjun drinks 1/8 litre. How much juice is left (in litres)? =
  30. 30.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  31. 31.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? =
  32. 32.A bottle has 5/6 litre of juice. Vihaan drinks 1/5 litre. How much juice is left (in litres)? =
  33. 33.3/8 − 1/6 =
  34. 34.A tank is 1/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  35. 35.2/3 − 5/8 =
  36. 36.5/6 − 2/9 =
  37. 37.A bottle has 6/7 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  38. 38.Meera has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  39. 39.1/3 − 1/8 =
  40. 40.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? =

Answer key

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

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