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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 285 · 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 4/5 litre of juice. Meera drinks 3/4 litre. How much juice is left (in litres)? =
  2. 2.A bottle has 3/8 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  3. 3.Anaya has a ribbon 7/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  4. 4.2/3 − 2/7 =
  5. 5.Arjun has a ribbon 3/4 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  6. 6.2/5 − 1/3 =
  7. 7.1/2 − 3/10 =
  8. 8.7/10 − 1/6 =
  9. 9.2/3 − 1/4 =
  10. 10.6/7 − 1/2 =
  11. 11.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  12. 12.Riya has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  13. 13.Vihaan has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  14. 14.5/6 − 1/5 =
  15. 15.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  16. 16.Vihaan has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  17. 17.1/3 − 1/10 =
  18. 18.3/10 − 1/6 =
  19. 19.A bottle has 2/5 litre of juice. Meera drinks 3/10 litre. How much juice is left (in litres)? =
  20. 20.5/6 − 4/9 =
  21. 21.1/2 − 3/7 =
  22. 22.1/4 − 1/5 =
  23. 23.3/5 − 1/10 =
  24. 24.2/3 − 3/10 =
  25. 25.7/10 − 1/4 =
  26. 26.8/9 − 2/3 =
  27. 27.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  28. 28.2/3 − 3/7 =
  29. 29.A tank is 2/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  30. 30.Ishaan has a ribbon 1/2 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  31. 31.A tank is 5/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  32. 32.7/8 − 1/4 =
  33. 33.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  34. 34.8/9 − 1/2 =
  35. 35.Vihaan has a ribbon 2/3 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  36. 36.Diya has a ribbon 3/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 7/10 litre of juice. Tara drinks 1/5 litre. How much juice is left (in litres)? =
  38. 38.5/6 − 2/5 =
  39. 39.1/2 − 1/7 =
  40. 40.4/5 − 3/4 =

Answer key

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

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