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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 824 · 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 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  2. 2.3/4 − 2/7 =
  3. 3.3/5 − 1/3 =
  4. 4.A bottle has 5/6 litre of juice. Vihaan drinks 3/8 litre. How much juice is left (in litres)? =
  5. 5.5/9 − 1/6 =
  6. 6.A bottle has 5/6 litre of juice. Vihaan drinks 3/5 litre. How much juice is left (in litres)? =
  7. 7.7/9 − 1/6 =
  8. 8.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? =
  9. 9.7/10 − 2/3 =
  10. 10.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  11. 11.1/3 − 1/7 =
  12. 12.3/4 − 3/8 =
  13. 13.6/7 − 3/4 =
  14. 14.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  15. 15.Sara has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  16. 16.1/2 − 4/9 =
  17. 17.Vihaan has a ribbon 5/6 m long and cuts off 7/9 m. How long is the ribbon now (in m)? =
  18. 18.Kabir has a ribbon 1/2 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  19. 19.A bottle has 9/10 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  20. 20.3/5 − 1/2 =
  21. 21.2/7 − 1/4 =
  22. 22.5/6 − 3/8 =
  23. 23.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  24. 24.5/6 − 3/4 =
  25. 25.Ishaan has a ribbon 5/6 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  26. 26.5/6 − 1/8 =
  27. 27.A bottle has 3/4 litre of juice. Aarav drinks 2/5 litre. How much juice is left (in litres)? =
  28. 28.1/3 − 2/9 =
  29. 29.7/8 − 1/3 =
  30. 30.A tank is 2/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  31. 31.2/3 − 3/7 =
  32. 32.A bottle has 4/5 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 2/3 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  34. 34.A bottle has 3/4 litre of juice. Anaya drinks 2/7 litre. How much juice is left (in litres)? =
  35. 35.3/5 − 3/10 =
  36. 36.1/3 − 1/9 =
  37. 37.3/4 − 1/3 =
  38. 38.A tank is 3/4 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  39. 39.Arjun has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  40. 40.8/9 − 1/6 =

Answer key

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

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