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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 153 · 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. 1.1/2 − 4/9 =
  2. 2.A tank is 3/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  3. 3.Ishaan has a ribbon 2/3 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  4. 4.Riya has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  5. 5.Ishaan has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  6. 6.4/9 − 1/3 =
  7. 7.4/5 − 1/4 =
  8. 8.1/3 − 2/9 =
  9. 9.A bottle has 9/10 litre of juice. Anaya drinks 1/5 litre. How much juice is left (in litres)? =
  10. 10.3/7 − 1/3 =
  11. 11.2/5 − 1/3 =
  12. 12.A bottle has 5/7 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  13. 13.A tank is 4/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  14. 14.A bottle has 5/6 litre of juice. Rohan drinks 7/9 litre. How much juice is left (in litres)? =
  15. 15.Meera has a ribbon 7/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  16. 16.A bottle has 1/2 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  17. 17.3/4 − 3/5 =
  18. 18.A bottle has 5/6 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  19. 19.Aarav has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  20. 20.7/9 − 1/2 =
  21. 21.A tank is 7/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  22. 22.4/7 − 1/3 =
  23. 23.Diya has a ribbon 3/4 m long and cuts off 5/7 m. How long is the ribbon now (in m)? =
  24. 24.7/9 − 2/3 =
  25. 25.3/10 − 1/4 =
  26. 26.Kabir has a ribbon 7/8 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  27. 27.A tank is 3/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  28. 28.8/9 − 2/3 =
  29. 29.5/6 − 2/5 =
  30. 30.3/4 − 3/8 =
  31. 31.3/4 − 3/7 =
  32. 32.4/5 − 1/10 =
  33. 33.5/8 − 1/2 =
  34. 34.5/9 − 1/3 =
  35. 35.5/9 − 1/2 =
  36. 36.A bottle has 2/3 litre of juice. Anaya drinks 1/9 litre. How much juice is left (in litres)? =
  37. 37.8/9 − 1/3 =
  38. 38.Sara has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  39. 39.2/3 − 2/9 =
  40. 40.7/9 − 1/6 =

Answer key

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

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