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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 351 · 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. 1.3/4 − 2/7 =
  2. 2.A bottle has 1/2 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  3. 3.1/4 − 1/7 =
  4. 4.6/7 − 2/3 =
  5. 5.Anaya has a ribbon 5/6 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  6. 6.A tank is 7/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  7. 7.2/3 − 1/5 =
  8. 8.A tank is 1/2 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  9. 9.1/2 − 2/7 =
  10. 10.A bottle has 9/10 litre of juice. Rohan drinks 4/5 litre. How much juice is left (in litres)? =
  11. 11.7/8 − 1/2 =
  12. 12.1/5 − 1/10 =
  13. 13.7/10 − 3/5 =
  14. 14.2/3 − 2/7 =
  15. 15.Ishaan has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  16. 16.A bottle has 7/9 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  17. 17.A tank is 2/3 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  18. 18.Sara has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  19. 19.Arjun has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  20. 20.A bottle has 1/3 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =
  21. 21.1/3 − 2/9 =
  22. 22.Anaya has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  23. 23.A bottle has 6/7 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  24. 24.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? =
  25. 25.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  26. 26.Ishaan has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  27. 27.A bottle has 9/10 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  28. 28.4/9 − 1/6 =
  29. 29.5/8 − 1/6 =
  30. 30.Ishaan has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  31. 31.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? =
  32. 32.5/6 − 1/9 =
  33. 33.7/9 − 1/2 =
  34. 34.Rohan has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  35. 35.7/8 − 2/3 =
  36. 36.5/6 − 2/3 =
  37. 37.A bottle has 3/4 litre of juice. Ishaan drinks 2/5 litre. How much juice is left (in litres)? =
  38. 38.Riya has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  39. 39.4/5 − 1/10 =
  40. 40.A bottle has 8/9 litre of juice. Aarav drinks 5/6 litre. How much juice is left (in litres)? =

Answer key

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

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