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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 806 · 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. 1.5/6 − 1/3 =
  2. 2.3/4 − 4/7 =
  3. 3.3/4 − 3/8 =
  4. 4.6/7 − 3/4 =
  5. 5.5/6 − 1/4 =
  6. 6.A tank is 2/3 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  7. 7.A tank is 5/6 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  8. 8.1/3 − 1/8 =
  9. 9.3/8 − 1/4 =
  10. 10.A bottle has 2/5 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  11. 11.3/4 − 5/8 =
  12. 12.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  13. 13.1/4 − 1/8 =
  14. 14.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  15. 15.2/5 − 1/6 =
  16. 16.A bottle has 1/4 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  17. 17.1/3 − 3/10 =
  18. 18.A tank is 4/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  19. 19.5/8 − 1/2 =
  20. 20.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  21. 21.3/5 − 1/3 =
  22. 22.5/6 − 5/8 =
  23. 23.A bottle has 9/10 litre of juice. Arjun drinks 4/5 litre. How much juice is left (in litres)? =
  24. 24.2/3 − 1/8 =
  25. 25.7/10 − 3/5 =
  26. 26.3/10 − 1/5 =
  27. 27.A bottle has 5/7 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  28. 28.3/10 − 1/6 =
  29. 29.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? =
  30. 30.1/5 − 1/10 =
  31. 31.A bottle has 7/8 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 2/3 litre of juice. Tara drinks 2/9 litre. How much juice is left (in litres)? =
  33. 33.A tank is 2/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  34. 34.Kabir has a ribbon 5/6 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  35. 35.4/9 − 1/3 =
  36. 36.8/9 − 2/3 =
  37. 37.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  38. 38.2/5 − 1/4 =
  39. 39.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  40. 40.5/6 − 2/9 =

Answer key

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

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