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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 227 · 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. Diya drinks 3/7 litre. How much juice is left (in litres)? =
  2. 2.1/2 − 1/9 =
  3. 3.1/6 − 1/8 =
  4. 4.6/7 − 2/3 =
  5. 5.Sara has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  6. 6.7/10 − 1/2 =
  7. 7.1/4 − 1/7 =
  8. 8.9/10 − 1/6 =
  9. 9.A tank is 9/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  10. 10.3/5 − 1/10 =
  11. 11.5/7 − 1/4 =
  12. 12.A bottle has 7/8 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  13. 13.7/8 − 3/4 =
  14. 14.2/3 − 4/9 =
  15. 15.3/4 − 2/5 =
  16. 16.2/5 − 3/10 =
  17. 17.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  18. 18.3/8 − 1/6 =
  19. 19.Diya has a ribbon 3/4 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  20. 20.1/2 − 1/5 =
  21. 21.1/5 − 1/10 =
  22. 22.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  23. 23.3/5 − 1/2 =
  24. 24.Ishaan has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  25. 25.A tank is 3/4 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  26. 26.A bottle has 3/10 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  27. 27.Arjun has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  28. 28.Diya has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  29. 29.7/9 − 1/2 =
  30. 30.A bottle has 1/2 litre of juice. Vihaan drinks 3/8 litre. How much juice is left (in litres)? =
  31. 31.5/6 − 2/3 =
  32. 32.1/4 − 1/5 =
  33. 33.A bottle has 1/4 litre of juice. Sara drinks 1/8 litre. How much juice is left (in litres)? =
  34. 34.1/6 − 1/10 =
  35. 35.Diya has a ribbon 3/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  36. 36.5/9 − 1/6 =
  37. 37.4/5 − 1/2 =
  38. 38.A tank is 5/6 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  39. 39.A tank is 5/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  40. 40.3/5 − 3/10 =

Answer key

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

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