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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 2 · 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. 1.3/5 − 3/10 =
  2. 2.1/4 − 1/7 =
  3. 3.A bottle has 3/4 litre of juice. Rohan drinks 7/10 litre. How much juice is left (in litres)? =
  4. 4.2/3 − 5/8 =
  5. 5.A bottle has 5/8 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  6. 6.1/2 − 3/8 =
  7. 7.1/5 − 1/10 =
  8. 8.Arjun has a ribbon 5/6 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  9. 9.Anaya has a ribbon 9/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  10. 10.3/4 − 4/7 =
  11. 11.Ishaan has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  12. 12.5/9 − 1/2 =
  13. 13.Kabir has a ribbon 1/2 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  14. 14.4/9 − 1/3 =
  15. 15.A bottle has 7/10 litre of juice. Aarav drinks 2/5 litre. How much juice is left (in litres)? =
  16. 16.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? =
  17. 17.A bottle has 8/9 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  18. 18.1/3 − 2/9 =
  19. 19.A tank is 5/6 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  20. 20.Diya has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  21. 21.3/4 − 2/3 =
  22. 22.7/10 − 2/3 =
  23. 23.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? =
  24. 24.1/3 − 2/7 =
  25. 25.5/7 − 1/3 =
  26. 26.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? =
  27. 27.5/6 − 4/5 =
  28. 28.7/9 − 1/3 =
  29. 29.7/9 − 1/6 =
  30. 30.1/2 − 1/7 =
  31. 31.1/2 − 4/9 =
  32. 32.A bottle has 9/10 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 3/4 litre of juice. Diya drinks 3/10 litre. How much juice is left (in litres)? =
  34. 34.A tank is 3/4 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  35. 35.8/9 − 1/6 =
  36. 36.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  37. 37.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? =
  38. 38.A tank is 4/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  39. 39.6/7 − 3/4 =
  40. 40.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? =

Answer key

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

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