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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 937 · 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. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  2. 2.3/4 − 1/7 =
  3. 3.7/8 − 5/6 =
  4. 4.1/2 − 1/5 =
  5. 5.9/10 − 1/6 =
  6. 6.2/3 − 2/7 =
  7. 7.3/8 − 1/3 =
  8. 8.A bottle has 1/3 litre of juice. Anaya drinks 1/10 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 7/10 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  10. 10.Meera has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  11. 11.7/9 − 1/6 =
  12. 12.1/2 − 4/9 =
  13. 13.2/3 − 2/9 =
  14. 14.Rohan has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  15. 15.7/8 − 1/3 =
  16. 16.1/3 − 1/6 =
  17. 17.7/8 − 2/3 =
  18. 18.Rohan has a ribbon 2/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  19. 19.4/9 − 1/3 =
  20. 20.2/5 − 1/4 =
  21. 21.A bottle has 5/6 litre of juice. Tara drinks 3/4 litre. How much juice is left (in litres)? =
  22. 22.2/3 − 1/4 =
  23. 23.7/10 − 1/4 =
  24. 24.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  25. 25.Tara has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  26. 26.9/10 − 1/5 =
  27. 27.A tank is 2/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  28. 28.3/5 − 3/10 =
  29. 29.Riya has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  30. 30.5/9 − 1/2 =
  31. 31.A bottle has 3/4 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  32. 32.5/7 − 1/4 =
  33. 33.Tara has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  34. 34.A bottle has 3/5 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 2/5 litre of juice. Arjun drinks 3/10 litre. How much juice is left (in litres)? =
  36. 36.Anaya has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  37. 37.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? =
  38. 38.3/4 − 1/6 =
  39. 39.A tank is 9/10 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  40. 40.3/4 − 1/3 =

Answer key

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

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