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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 452 · 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.Aarav has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  2. 2.1/6 − 1/9 =
  3. 3.8/9 − 5/6 =
  4. 4.A tank is 2/3 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  5. 5.2/3 − 1/8 =
  6. 6.A tank is 1/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  7. 7.4/9 − 1/6 =
  8. 8.Diya has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  9. 9.5/6 − 1/9 =
  10. 10.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? =
  11. 11.A tank is 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  12. 12.A bottle has 3/4 litre of juice. Arjun drinks 3/5 litre. How much juice is left (in litres)? =
  13. 13.3/8 − 1/6 =
  14. 14.Meera has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  15. 15.3/7 − 1/3 =
  16. 16.1/3 − 1/4 =
  17. 17.A bottle has 5/6 litre of juice. Ishaan drinks 1/8 litre. How much juice is left (in litres)? =
  18. 18.A tank is 4/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  19. 19.2/3 − 2/7 =
  20. 20.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? =
  21. 21.A tank is 3/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  22. 22.Rohan has a ribbon 5/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  23. 23.Rohan has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  24. 24.7/9 − 1/6 =
  25. 25.A tank is 6/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  26. 26.A bottle has 5/6 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  27. 27.Aarav has a ribbon 3/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  28. 28.A tank is 5/6 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  29. 29.2/3 − 4/9 =
  30. 30.7/10 − 2/3 =
  31. 31.5/9 − 1/6 =
  32. 32.3/4 − 1/6 =
  33. 33.3/5 − 1/6 =
  34. 34.1/3 − 1/5 =
  35. 35.3/10 − 1/5 =
  36. 36.A bottle has 3/4 litre of juice. Sara drinks 5/7 litre. How much juice is left (in litres)? =
  37. 37.A bottle has 5/7 litre of juice. Diya drinks 2/3 litre. How much juice is left (in litres)? =
  38. 38.4/7 − 1/4 =
  39. 39.A bottle has 3/4 litre of juice. Kabir drinks 3/8 litre. How much juice is left (in litres)? =
  40. 40.7/8 − 3/4 =

Answer key

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

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