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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 809 · 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.Sara has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  2. 2.A bottle has 7/8 litre of juice. Vihaan drinks 3/4 litre. How much juice is left (in litres)? =
  3. 3.3/4 − 2/7 =
  4. 4.A bottle has 4/5 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  5. 5.7/8 − 1/6 =
  6. 6.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? =
  7. 7.1/2 − 3/7 =
  8. 8.9/10 − 3/4 =
  9. 9.Diya has a ribbon 5/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  10. 10.4/7 − 1/3 =
  11. 11.4/9 − 1/6 =
  12. 12.3/5 − 1/6 =
  13. 13.5/6 − 3/4 =
  14. 14.2/3 − 1/9 =
  15. 15.4/5 − 1/6 =
  16. 16.A tank is 5/6 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  17. 17.3/4 − 3/5 =
  18. 18.Sara has a ribbon 5/6 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  19. 19.1/3 − 2/7 =
  20. 20.A tank is 3/4 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  21. 21.5/8 − 1/3 =
  22. 22.5/8 − 1/6 =
  23. 23.A bottle has 5/6 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  24. 24.2/3 − 4/9 =
  25. 25.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  26. 26.1/2 − 3/8 =
  27. 27.A bottle has 3/4 litre of juice. Vihaan drinks 1/8 litre. How much juice is left (in litres)? =
  28. 28.3/4 − 2/5 =
  29. 29.2/3 − 1/8 =
  30. 30.Kabir has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  31. 31.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? =
  32. 32.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? =
  33. 33.1/2 − 2/9 =
  34. 34.3/5 − 3/10 =
  35. 35.4/5 − 1/4 =
  36. 36.A bottle has 2/3 litre of juice. Anaya drinks 3/7 litre. How much juice is left (in litres)? =
  37. 37.2/5 − 1/4 =
  38. 38.2/3 − 3/8 =
  39. 39.9/10 − 4/5 =
  40. 40.Meera has a ribbon 1/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =

Answer key

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

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