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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 407 · 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 1/2 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =
  2. 2.Diya has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  3. 3.7/10 − 2/3 =
  4. 4.A tank is 2/3 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  5. 5.1/2 − 2/7 =
  6. 6.7/8 − 1/2 =
  7. 7.7/10 − 1/3 =
  8. 8.A tank is 5/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  9. 9.A tank is 1/2 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  10. 10.3/5 − 1/2 =
  11. 11.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  12. 12.A bottle has 1/2 litre of juice. Riya drinks 3/8 litre. How much juice is left (in litres)? =
  13. 13.Ishaan has a ribbon 4/5 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  14. 14.7/8 − 3/4 =
  15. 15.2/3 − 2/9 =
  16. 16.A bottle has 3/4 litre of juice. Kabir drinks 3/5 litre. How much juice is left (in litres)? =
  17. 17.5/6 − 2/9 =
  18. 18.A bottle has 4/5 litre of juice. Ishaan drinks 1/10 litre. How much juice is left (in litres)? =
  19. 19.1/4 − 1/10 =
  20. 20.A tank is 4/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  21. 21.A tank is 1/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  22. 22.1/6 − 1/10 =
  23. 23.3/5 − 1/10 =
  24. 24.A bottle has 9/10 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  25. 25.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? =
  26. 26.3/10 − 1/5 =
  27. 27.1/3 − 1/10 =
  28. 28.4/5 − 1/4 =
  29. 29.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? =
  30. 30.2/3 − 4/7 =
  31. 31.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? =
  32. 32.7/8 − 1/3 =
  33. 33.A tank is 1/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  34. 34.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? =
  35. 35.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  36. 36.A tank is 2/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  37. 37.1/2 − 1/5 =
  38. 38.3/4 − 3/7 =
  39. 39.Arjun has a ribbon 3/4 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  40. 40.Kabir has a ribbon 4/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =

Answer key

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

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