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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 607 · 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. 2.1/2 − 4/9 =
  3. 3.2/5 − 1/4 =
  4. 4.A tank is 4/5 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  5. 5.4/7 − 1/4 =
  6. 6.3/4 − 2/7 =
  7. 7.A bottle has 1/6 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =
  8. 8.5/6 − 5/8 =
  9. 9.Ishaan has a ribbon 5/6 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  10. 10.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? =
  11. 11.7/9 − 1/2 =
  12. 12.Diya has a ribbon 5/6 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  13. 13.1/2 − 1/9 =
  14. 14.Ishaan has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  15. 15.5/8 − 1/3 =
  16. 16.7/9 − 1/3 =
  17. 17.7/9 − 1/6 =
  18. 18.3/4 − 4/7 =
  19. 19.5/6 − 1/5 =
  20. 20.A bottle has 2/3 litre of juice. Arjun drinks 5/8 litre. How much juice is left (in litres)? =
  21. 21.A bottle has 7/9 litre of juice. Riya drinks 2/3 litre. How much juice is left (in litres)? =
  22. 22.A tank is 5/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  23. 23.A bottle has 9/10 litre of juice. Arjun drinks 3/5 litre. How much juice is left (in litres)? =
  24. 24.3/5 − 1/6 =
  25. 25.1/3 − 1/5 =
  26. 26.A bottle has 1/2 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =
  27. 27.A bottle has 3/4 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  28. 28.1/3 − 1/9 =
  29. 29.Anaya has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  30. 30.5/6 − 1/10 =
  31. 31.Sara has a ribbon 5/6 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  32. 32.Anaya has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  33. 33.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  34. 34.2/5 − 1/3 =
  35. 35.Diya has a ribbon 2/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  36. 36.4/5 − 3/10 =
  37. 37.7/8 − 1/6 =
  38. 38.A bottle has 1/4 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  39. 39.2/3 − 1/9 =
  40. 40.5/9 − 1/2 =

Answer key

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

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