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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 181 · 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. 1.9/10 − 1/4 =
  2. 2.A bottle has 4/9 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 5/6 litre of juice. Diya drinks 3/4 litre. How much juice is left (in litres)? =
  4. 4.8/9 − 1/6 =
  5. 5.A bottle has 5/6 litre of juice. Rohan drinks 7/10 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 5/9 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  7. 7.1/3 − 2/9 =
  8. 8.5/6 − 5/9 =
  9. 9.1/4 − 1/5 =
  10. 10.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  11. 11.1/2 − 3/8 =
  12. 12.4/7 − 1/4 =
  13. 13.2/3 − 1/6 =
  14. 14.Arjun has a ribbon 2/3 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  15. 15.Sara has a ribbon 1/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  16. 16.7/10 − 1/3 =
  17. 17.5/6 − 7/10 =
  18. 18.Aarav has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  19. 19.4/7 − 1/2 =
  20. 20.2/3 − 5/8 =
  21. 21.1/4 − 1/8 =
  22. 22.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  23. 23.3/4 − 1/5 =
  24. 24.6/7 − 1/3 =
  25. 25.2/3 − 1/2 =
  26. 26.2/3 − 1/4 =
  27. 27.3/8 − 1/3 =
  28. 28.A bottle has 1/3 litre of juice. Sara drinks 1/8 litre. How much juice is left (in litres)? =
  29. 29.3/5 − 1/2 =
  30. 30.5/6 − 4/5 =
  31. 31.Arjun has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  32. 32.7/8 − 3/4 =
  33. 33.1/2 − 2/7 =
  34. 34.Sara has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  35. 35.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  36. 36.1/2 − 2/5 =
  37. 37.A bottle has 6/7 litre of juice. Anaya drinks 3/4 litre. How much juice is left (in litres)? =
  38. 38.A tank is 1/6 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  39. 39.2/3 − 1/8 =
  40. 40.1/2 − 1/5 =

Answer key

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

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