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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 436 · 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 1/4 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  2. 2.2/3 − 4/9 =
  3. 3.7/9 − 1/6 =
  4. 4.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  5. 5.A bottle has 7/9 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 5/6 litre of juice. Aarav drinks 3/5 litre. How much juice is left (in litres)? =
  7. 7.1/3 − 2/7 =
  8. 8.3/7 − 1/4 =
  9. 9.1/2 − 1/3 =
  10. 10.3/4 − 3/8 =
  11. 11.4/7 − 1/3 =
  12. 12.6/7 − 3/4 =
  13. 13.3/5 − 1/3 =
  14. 14.5/8 − 1/2 =
  15. 15.A tank is 8/9 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  16. 16.3/8 − 1/4 =
  17. 17.A bottle has 3/5 litre of juice. Rohan drinks 1/10 litre. How much juice is left (in litres)? =
  18. 18.2/3 − 1/4 =
  19. 19.8/9 − 2/3 =
  20. 20.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  21. 21.A tank is 7/8 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  22. 22.5/6 − 1/3 =
  23. 23.1/5 − 1/6 =
  24. 24.A tank is 3/4 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  25. 25.A tank is 3/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  26. 26.A tank is 2/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  27. 27.2/3 − 1/2 =
  28. 28.Kabir has a ribbon 4/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  29. 29.3/5 − 1/2 =
  30. 30.7/10 − 2/5 =
  31. 31.3/4 − 1/8 =
  32. 32.5/9 − 1/6 =
  33. 33.1/2 − 1/8 =
  34. 34.A bottle has 8/9 litre of juice. Diya drinks 2/3 litre. How much juice is left (in litres)? =
  35. 35.1/2 − 2/7 =
  36. 36.3/4 − 2/5 =
  37. 37.1/3 − 1/5 =
  38. 38.A tank is 1/2 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  39. 39.1/2 − 3/7 =
  40. 40.Diya has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =

Answer key

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

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