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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 104 · 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. 1.8/9 − 1/2 =
  2. 2.1/4 − 1/7 =
  3. 3.9/10 − 3/5 =
  4. 4.1/3 − 1/8 =
  5. 5.1/2 − 1/5 =
  6. 6.A tank is 1/2 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  7. 7.A bottle has 7/9 litre of juice. Anaya drinks 2/3 litre. How much juice is left (in litres)? =
  8. 8.A bottle has 1/2 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  9. 9.A tank is 5/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  10. 10.1/2 − 1/7 =
  11. 11.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? =
  12. 12.2/3 − 5/8 =
  13. 13.7/10 − 3/5 =
  14. 14.A bottle has 8/9 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  15. 15.3/10 − 1/5 =
  16. 16.A tank is 1/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  17. 17.3/4 − 3/10 =
  18. 18.3/4 − 2/7 =
  19. 19.4/5 − 7/10 =
  20. 20.Sara has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  21. 21.A tank is 3/4 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  22. 22.A bottle has 5/9 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  23. 23.5/6 − 2/3 =
  24. 24.3/5 − 1/4 =
  25. 25.5/6 − 1/10 =
  26. 26.3/4 − 5/7 =
  27. 27.A tank is 4/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  28. 28.A bottle has 2/3 litre of juice. Anaya drinks 4/7 litre. How much juice is left (in litres)? =
  29. 29.Diya has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  30. 30.A bottle has 1/3 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  31. 31.A bottle has 9/10 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  32. 32.2/3 − 1/8 =
  33. 33.A bottle has 7/8 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  34. 34.5/8 − 1/3 =
  35. 35.A bottle has 1/6 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 1/6 litre of juice. Diya drinks 1/8 litre. How much juice is left (in litres)? =
  37. 37.5/6 − 2/9 =
  38. 38.7/9 − 1/2 =
  39. 39.A bottle has 9/10 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  40. 40.3/4 − 1/5 =

Answer key

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

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