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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 35 · 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 − 2/9 =
  2. 2.3/4 − 3/8 =
  3. 3.1/2 − 4/9 =
  4. 4.7/10 − 1/5 =
  5. 5.3/5 − 1/6 =
  6. 6.A tank is 8/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  7. 7.4/9 − 1/3 =
  8. 8.7/9 − 1/3 =
  9. 9.A bottle has 3/4 litre of juice. Meera drinks 3/7 litre. How much juice is left (in litres)? =
  10. 10.2/3 − 5/9 =
  11. 11.Anaya has a ribbon 5/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  12. 12.A bottle has 4/9 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  13. 13.1/6 − 1/9 =
  14. 14.A tank is 2/3 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  15. 15.A bottle has 4/5 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 5/6 litre of juice. Diya drinks 3/4 litre. How much juice is left (in litres)? =
  17. 17.4/5 − 1/3 =
  18. 18.Arjun has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  19. 19.5/7 − 1/3 =
  20. 20.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  21. 21.A tank is 4/5 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  22. 22.1/4 − 1/8 =
  23. 23.Aarav has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  24. 24.3/4 − 3/5 =
  25. 25.A tank is 7/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  26. 26.A bottle has 7/8 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  27. 27.A tank is 3/5 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 5/6 litre of juice. Kabir drinks 4/9 litre. How much juice is left (in litres)? =
  29. 29.6/7 − 1/2 =
  30. 30.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 5/8 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  32. 32.A tank is 2/3 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  33. 33.5/6 − 3/10 =
  34. 34.A tank is 1/2 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 − 2/7 =
  36. 36.2/3 − 1/5 =
  37. 37.7/8 − 3/4 =
  38. 38.A tank is 7/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  39. 39.Sara has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  40. 40.8/9 − 1/3 =

Answer key

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

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