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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 251 · 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.Ishaan has a ribbon 5/6 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  2. 2.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? =
  3. 3.9/10 − 3/5 =
  4. 4.3/4 − 4/7 =
  5. 5.8/9 − 2/3 =
  6. 6.A tank is 5/6 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  7. 7.5/7 − 2/3 =
  8. 8.A tank is 4/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  9. 9.1/4 − 1/5 =
  10. 10.7/8 − 1/4 =
  11. 11.1/2 − 1/6 =
  12. 12.8/9 − 1/6 =
  13. 13.5/7 − 1/2 =
  14. 14.Ishaan has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  15. 15.A bottle has 2/3 litre of juice. Diya drinks 1/9 litre. How much juice is left (in litres)? =
  16. 16.Arjun has a ribbon 5/6 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  17. 17.A tank is 7/8 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  18. 18.Ishaan has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  19. 19.Sara has a ribbon 1/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  20. 20.9/10 − 1/5 =
  21. 21.7/10 − 1/4 =
  22. 22.Tara has a ribbon 1/2 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  23. 23.5/6 − 4/5 =
  24. 24.2/3 − 2/9 =
  25. 25.A bottle has 5/7 litre of juice. Arjun drinks 2/3 litre. How much juice is left (in litres)? =
  26. 26.A tank is 2/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  27. 27.7/9 − 2/3 =
  28. 28.7/8 − 1/3 =
  29. 29.5/6 − 3/4 =
  30. 30.5/6 − 4/9 =
  31. 31.2/3 − 3/10 =
  32. 32.1/2 − 3/8 =
  33. 33.Diya has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  34. 34.A tank is 5/6 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  35. 35.5/6 − 5/9 =
  36. 36.Tara has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  37. 37.4/5 − 3/10 =
  38. 38.4/9 − 1/3 =
  39. 39.7/10 − 2/5 =
  40. 40.A tank is 2/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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