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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 836 · 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. 1.5/8 − 1/3 =
  2. 2.4/5 − 1/3 =
  3. 3.8/9 − 5/6 =
  4. 4.5/7 − 1/4 =
  5. 5.4/9 − 1/6 =
  6. 6.A bottle has 1/2 litre of juice. Rohan drinks 3/8 litre. How much juice is left (in litres)? =
  7. 7.1/2 − 2/5 =
  8. 8.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? =
  9. 9.A bottle has 4/5 litre of juice. Anaya drinks 3/10 litre. How much juice is left (in litres)? =
  10. 10.7/10 − 3/5 =
  11. 11.A bottle has 2/3 litre of juice. Aarav drinks 2/7 litre. How much juice is left (in litres)? =
  12. 12.5/6 − 1/10 =
  13. 13.A tank is 7/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  14. 14.1/4 − 1/8 =
  15. 15.A bottle has 1/3 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 3/4 litre of juice. Ishaan drinks 1/8 litre. How much juice is left (in litres)? =
  17. 17.1/4 − 1/7 =
  18. 18.A tank is 1/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  19. 19.7/8 − 3/4 =
  20. 20.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  21. 21.A tank is 9/10 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  22. 22.Aarav has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  23. 23.9/10 − 3/4 =
  24. 24.Riya has a ribbon 3/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  25. 25.6/7 − 1/4 =
  26. 26.Kabir has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  27. 27.Arjun has a ribbon 9/10 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  28. 28.Vihaan has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  29. 29.4/5 − 3/10 =
  30. 30.A tank is 5/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  31. 31.5/6 − 2/3 =
  32. 32.Vihaan has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  33. 33.A tank is 5/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  34. 34.2/3 − 3/7 =
  35. 35.Meera has a ribbon 3/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  36. 36.A tank is 3/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  37. 37.A bottle has 3/8 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  38. 38.3/4 − 2/7 =
  39. 39.Aarav has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  40. 40.A bottle has 1/6 litre of juice. Riya drinks 1/9 litre. How much juice is left (in litres)? =

Answer key

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

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