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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 814 · 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. 1.1/3 − 1/9 =
  2. 2.Ishaan has a ribbon 5/6 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  3. 3.5/6 − 4/9 =
  4. 4.7/8 − 5/6 =
  5. 5.2/5 − 1/4 =
  6. 6.Kabir has a ribbon 1/2 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  7. 7.7/8 − 1/2 =
  8. 8.1/3 − 1/8 =
  9. 9.A bottle has 1/2 litre of juice. Rohan drinks 1/8 litre. How much juice is left (in litres)? =
  10. 10.7/8 − 1/6 =
  11. 11.1/3 − 1/10 =
  12. 12.3/5 − 1/3 =
  13. 13.Arjun has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  14. 14.A bottle has 1/3 litre of juice. Riya drinks 1/7 litre. How much juice is left (in litres)? =
  15. 15.A bottle has 1/2 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  16. 16.A tank is 4/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  17. 17.1/4 − 1/7 =
  18. 18.A bottle has 4/7 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  19. 19.A bottle has 5/7 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  20. 20.Diya has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  21. 21.2/3 − 4/9 =
  22. 22.2/3 − 2/5 =
  23. 23.A tank is 1/2 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  24. 24.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? =
  25. 25.8/9 − 5/6 =
  26. 26.5/6 − 1/9 =
  27. 27.Tara has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  28. 28.1/2 − 2/5 =
  29. 29.8/9 − 1/2 =
  30. 30.5/6 − 7/10 =
  31. 31.A tank is 5/6 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  32. 32.A bottle has 3/5 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 3/4 litre of juice. Vihaan drinks 1/5 litre. How much juice is left (in litres)? =
  34. 34.2/3 − 2/9 =
  35. 35.A bottle has 3/5 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 2/3 litre of juice. Rohan drinks 4/9 litre. How much juice is left (in litres)? =
  37. 37.Kabir has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  38. 38.Ishaan has a ribbon 7/8 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  39. 39.A tank is 1/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  40. 40.A tank is 4/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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