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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 309 · 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 − 5/7 =
  2. 2.Aarav has a ribbon 2/3 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  3. 3.2/5 − 3/10 =
  4. 4.5/6 − 7/10 =
  5. 5.A tank is 1/2 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  6. 6.7/8 − 1/3 =
  7. 7.8/9 − 2/3 =
  8. 8.4/7 − 1/3 =
  9. 9.1/2 − 2/5 =
  10. 10.1/3 − 3/10 =
  11. 11.7/8 − 5/6 =
  12. 12.2/3 − 2/5 =
  13. 13.A bottle has 2/3 litre of juice. Arjun drinks 5/9 litre. How much juice is left (in litres)? =
  14. 14.1/3 − 1/9 =
  15. 15.A bottle has 7/10 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 3/4 litre of juice. Diya drinks 1/5 litre. How much juice is left (in litres)? =
  17. 17.Tara has a ribbon 4/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  18. 18.5/8 − 1/3 =
  19. 19.Aarav has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  20. 20.Rohan has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  21. 21.9/10 − 2/3 =
  22. 22.3/4 − 3/5 =
  23. 23.Anaya has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  24. 24.A bottle has 1/6 litre of juice. Meera drinks 1/9 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 1/2 litre of juice. Riya drinks 1/9 litre. How much juice is left (in litres)? =
  26. 26.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  27. 27.1/3 − 2/7 =
  28. 28.2/3 − 1/8 =
  29. 29.Ishaan has a ribbon 9/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  30. 30.7/10 − 3/5 =
  31. 31.5/6 − 1/4 =
  32. 32.A tank is 3/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  33. 33.Rohan has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  34. 34.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  35. 35.A bottle has 9/10 litre of juice. Tara drinks 3/5 litre. How much juice is left (in litres)? =
  36. 36.Anaya has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  37. 37.6/7 − 1/2 =
  38. 38.1/2 − 3/7 =
  39. 39.A tank is 2/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  40. 40.A tank is 1/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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