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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 726 · 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. 1.7/8 − 2/3 =
  2. 2.1/2 − 2/9 =
  3. 3.1/2 − 1/8 =
  4. 4.1/3 − 2/9 =
  5. 5.7/10 − 1/2 =
  6. 6.8/9 − 1/2 =
  7. 7.A bottle has 5/8 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  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. 9.5/9 − 1/3 =
  10. 10.1/5 − 1/10 =
  11. 11.Ishaan has a ribbon 4/5 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  12. 12.2/3 − 4/7 =
  13. 13.2/7 − 1/4 =
  14. 14.5/7 − 2/3 =
  15. 15.3/5 − 1/4 =
  16. 16.8/9 − 2/3 =
  17. 17.4/7 − 1/3 =
  18. 18.3/10 − 1/5 =
  19. 19.3/5 − 3/10 =
  20. 20.7/8 − 5/6 =
  21. 21.3/4 − 5/8 =
  22. 22.A bottle has 7/8 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 7/8 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  24. 24.8/9 − 1/6 =
  25. 25.A bottle has 3/5 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  26. 26.1/4 − 1/10 =
  27. 27.2/3 − 3/5 =
  28. 28.Kabir has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  29. 29.2/3 − 2/9 =
  30. 30.A tank is 2/3 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 7/10 litre of juice. Vihaan drinks 1/5 litre. How much juice is left (in litres)? =
  32. 32.Rohan has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  33. 33.1/4 − 1/8 =
  34. 34.1/6 − 1/9 =
  35. 35.3/4 − 2/5 =
  36. 36.2/9 − 1/6 =
  37. 37.A bottle has 3/10 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  38. 38.Vihaan has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  39. 39.1/2 − 1/4 =
  40. 40.Rohan has a ribbon 5/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =

Answer key

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

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