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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 122 · 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.A bottle has 1/3 litre of juice. Vihaan drinks 1/5 litre. How much juice is left (in litres)? =
  2. 2.1/2 − 1/10 =
  3. 3.3/8 − 1/4 =
  4. 4.7/8 − 1/3 =
  5. 5.Kabir has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  6. 6.2/3 − 1/10 =
  7. 7.A tank is 5/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  8. 8.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? =
  9. 9.9/10 − 1/5 =
  10. 10.9/10 − 2/5 =
  11. 11.Sara has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  12. 12.5/6 − 5/8 =
  13. 13.A bottle has 1/2 litre of juice. Riya drinks 1/8 litre. How much juice is left (in litres)? =
  14. 14.3/8 − 1/6 =
  15. 15.3/4 − 5/8 =
  16. 16.Ishaan has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  17. 17.2/3 − 3/7 =
  18. 18.A tank is 5/6 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  19. 19.5/8 − 1/2 =
  20. 20.5/9 − 1/3 =
  21. 21.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? =
  22. 22.1/3 − 1/7 =
  23. 23.5/7 − 1/3 =
  24. 24.Kabir has a ribbon 3/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  25. 25.5/7 − 2/3 =
  26. 26.4/7 − 1/4 =
  27. 27.7/8 − 1/2 =
  28. 28.A bottle has 1/4 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  29. 29.Vihaan has a ribbon 5/6 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  30. 30.3/4 − 2/7 =
  31. 31.A bottle has 5/7 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  32. 32.7/10 − 1/3 =
  33. 33.1/2 − 2/9 =
  34. 34.5/9 − 1/2 =
  35. 35.A tank is 1/2 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  36. 36.2/3 − 2/9 =
  37. 37.4/5 − 7/10 =
  38. 38.1/6 − 1/8 =
  39. 39.3/4 − 1/6 =
  40. 40.Aarav has a ribbon 1/2 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =

Answer key

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

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