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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 535 · 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 − 3/8 =
  2. 2.9/10 − 3/4 =
  3. 3.2/3 − 1/2 =
  4. 4.A tank is 1/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  5. 5.Riya has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  6. 6.7/8 − 5/6 =
  7. 7.Anaya has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  8. 8.4/5 − 1/3 =
  9. 9.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? =
  10. 10.A tank is 2/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  11. 11.1/3 − 1/7 =
  12. 12.A bottle has 7/10 litre of juice. Anaya drinks 2/5 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 3/4 litre of juice. Meera drinks 5/8 litre. How much juice is left (in litres)? =
  14. 14.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  15. 15.6/7 − 1/4 =
  16. 16.5/8 − 1/4 =
  17. 17.1/6 − 1/9 =
  18. 18.A bottle has 1/2 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  19. 19.A tank is 5/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  20. 20.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  21. 21.Tara has a ribbon 5/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  22. 22.4/5 − 1/10 =
  23. 23.A tank is 7/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  24. 24.7/9 − 1/3 =
  25. 25.A bottle has 4/5 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  26. 26.A tank is 4/5 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  27. 27.5/7 − 1/2 =
  28. 28.1/2 − 1/7 =
  29. 29.Riya has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  30. 30.Anaya has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  31. 31.Arjun has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  32. 32.4/5 − 1/2 =
  33. 33.9/10 − 1/2 =
  34. 34.A bottle has 3/5 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  35. 35.A tank is 5/6 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  36. 36.A bottle has 1/6 litre of juice. Anaya drinks 1/9 litre. How much juice is left (in litres)? =
  37. 37.7/10 − 1/6 =
  38. 38.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? =
  39. 39.A tank is 6/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  40. 40.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? =

Answer key

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

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