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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 466 · 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. 1.7/8 − 1/6 =
  2. 2.Sara has a ribbon 5/6 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  3. 3.4/5 − 7/10 =
  4. 4.7/8 − 1/2 =
  5. 5.5/6 − 7/9 =
  6. 6.Rohan has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  7. 7.4/7 − 1/2 =
  8. 8.A bottle has 1/2 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =
  9. 9.7/8 − 1/3 =
  10. 10.A bottle has 3/10 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  11. 11.A tank is 3/4 full of water. Then water filling 5/7 of the tank is used. What fraction of the tank is full now? =
  12. 12.2/9 − 1/6 =
  13. 13.3/4 − 1/7 =
  14. 14.9/10 − 2/5 =
  15. 15.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? =
  16. 16.Riya has a ribbon 5/6 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 6/7 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  18. 18.3/4 − 1/10 =
  19. 19.Diya has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  20. 20.2/3 − 3/7 =
  21. 21.9/10 − 3/4 =
  22. 22.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  23. 23.1/3 − 1/6 =
  24. 24.9/10 − 1/6 =
  25. 25.3/4 − 1/5 =
  26. 26.Tara has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  27. 27.A tank is 7/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  28. 28.A tank is 3/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  29. 29.9/10 − 1/3 =
  30. 30.Sara has a ribbon 9/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  31. 31.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  32. 32.7/9 − 1/2 =
  33. 33.5/6 − 5/9 =
  34. 34.2/3 − 5/9 =
  35. 35.A bottle has 1/2 litre of juice. Diya drinks 1/8 litre. How much juice is left (in litres)? =
  36. 36.Diya has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  37. 37.2/3 − 1/7 =
  38. 38.A bottle has 5/7 litre of juice. Sara drinks 2/3 litre. How much juice is left (in litres)? =
  39. 39.1/2 − 1/9 =
  40. 40.8/9 − 2/3 =

Answer key

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

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