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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 266 · 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.A tank is 5/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  2. 2.3/8 − 1/4 =
  3. 3.4/5 − 1/2 =
  4. 4.A bottle has 3/5 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  5. 5.7/9 − 2/3 =
  6. 6.2/9 − 1/6 =
  7. 7.7/10 − 1/4 =
  8. 8.5/6 − 7/9 =
  9. 9.4/5 − 1/10 =
  10. 10.A tank is 6/7 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  11. 11.Kabir has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  12. 12.A bottle has 2/5 litre of juice. Diya drinks 1/10 litre. How much juice is left (in litres)? =
  13. 13.3/8 − 1/6 =
  14. 14.1/5 − 1/10 =
  15. 15.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  16. 16.5/6 − 7/10 =
  17. 17.A bottle has 3/5 litre of juice. Tara drinks 3/10 litre. How much juice is left (in litres)? =
  18. 18.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  19. 19.A tank is 1/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  20. 20.A bottle has 6/7 litre of juice. Diya drinks 3/4 litre. How much juice is left (in litres)? =
  21. 21.Ishaan has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  22. 22.4/5 − 3/4 =
  23. 23.1/2 − 2/7 =
  24. 24.Kabir has a ribbon 5/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  25. 25.8/9 − 2/3 =
  26. 26.5/9 − 1/3 =
  27. 27.Tara has a ribbon 2/3 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  28. 28.5/6 − 2/3 =
  29. 29.5/6 − 2/9 =
  30. 30.2/3 − 3/7 =
  31. 31.2/3 − 3/8 =
  32. 32.6/7 − 1/2 =
  33. 33.A bottle has 4/9 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  34. 34.1/2 − 1/6 =
  35. 35.Sara has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  36. 36.A tank is 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  37. 37.9/10 − 1/6 =
  38. 38.A tank is 7/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  39. 39.5/7 − 1/4 =
  40. 40.A tank is 7/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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