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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 49 · 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. 1.6/7 − 1/4 =
  2. 2.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? =
  3. 3.Sara has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  4. 4.A bottle has 7/10 litre of juice. Rohan drinks 3/5 litre. How much juice is left (in litres)? =
  5. 5.2/3 − 4/9 =
  6. 6.Arjun has a ribbon 5/6 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  7. 7.A bottle has 1/2 litre of juice. Riya drinks 4/9 litre. How much juice is left (in litres)? =
  8. 8.A bottle has 1/2 litre of juice. Tara drinks 1/8 litre. How much juice is left (in litres)? =
  9. 9.7/8 − 1/4 =
  10. 10.1/3 − 1/10 =
  11. 11.3/4 − 1/7 =
  12. 12.2/5 − 1/4 =
  13. 13.2/3 − 5/9 =
  14. 14.5/6 − 1/4 =
  15. 15.7/10 − 1/6 =
  16. 16.Ishaan has a ribbon 2/3 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  17. 17.1/3 − 1/9 =
  18. 18.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? =
  19. 19.Vihaan has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  20. 20.A bottle has 5/6 litre of juice. Ishaan drinks 3/8 litre. How much juice is left (in litres)? =
  21. 21.7/9 − 1/3 =
  22. 22.A bottle has 2/5 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  23. 23.9/10 − 1/5 =
  24. 24.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? =
  25. 25.4/5 − 3/4 =
  26. 26.Sara has a ribbon 3/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  27. 27.1/3 − 1/4 =
  28. 28.A bottle has 2/3 litre of juice. Riya drinks 2/7 litre. How much juice is left (in litres)? =
  29. 29.8/9 − 1/3 =
  30. 30.4/5 − 2/3 =
  31. 31.A bottle has 4/5 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  32. 32.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  33. 33.9/10 − 1/6 =
  34. 34.3/4 − 7/10 =
  35. 35.Ishaan has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  36. 36.3/5 − 1/3 =
  37. 37.1/2 − 3/7 =
  38. 38.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  39. 39.4/5 − 1/10 =
  40. 40.9/10 − 2/5 =

Answer key

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

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