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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 512 · 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. 1.1/2 − 1/4 =
  2. 2.Diya has a ribbon 3/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  3. 3.A tank is 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  4. 4.4/5 − 7/10 =
  5. 5.Kabir has a ribbon 1/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  6. 6.7/8 − 3/4 =
  7. 7.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  8. 8.7/10 − 1/5 =
  9. 9.7/10 − 1/2 =
  10. 10.3/5 − 1/3 =
  11. 11.1/3 − 2/9 =
  12. 12.A tank is 5/6 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  13. 13.A bottle has 7/8 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  14. 14.9/10 − 1/3 =
  15. 15.8/9 − 1/6 =
  16. 16.3/7 − 1/4 =
  17. 17.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? =
  18. 18.A bottle has 2/3 litre of juice. Vihaan drinks 1/9 litre. How much juice is left (in litres)? =
  19. 19.A tank is 2/3 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  20. 20.Kabir has a ribbon 1/2 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  21. 21.A tank is 3/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  22. 22.4/5 − 1/4 =
  23. 23.3/10 − 1/6 =
  24. 24.Diya has a ribbon 5/6 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  25. 25.3/4 − 3/8 =
  26. 26.Vihaan has a ribbon 7/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  27. 27.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? =
  28. 28.Sara has a ribbon 3/4 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  29. 29.Anaya has a ribbon 2/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  30. 30.2/3 − 3/5 =
  31. 31.7/9 − 1/3 =
  32. 32.7/9 − 1/2 =
  33. 33.A tank is 3/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  34. 34.7/10 − 1/6 =
  35. 35.1/2 − 4/9 =
  36. 36.1/2 − 1/9 =
  37. 37.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  38. 38.4/5 − 1/6 =
  39. 39.Tara has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  40. 40.2/3 − 3/8 =

Answer key

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

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