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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 460 · 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. 1.3/4 − 3/5 =
  2. 2.Ishaan has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  3. 3.A tank is 1/2 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  4. 4.3/10 − 1/5 =
  5. 5.9/10 − 2/3 =
  6. 6.8/9 − 1/3 =
  7. 7.Kabir has a ribbon 5/6 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  8. 8.A bottle has 9/10 litre of juice. Meera drinks 3/4 litre. How much juice is left (in litres)? =
  9. 9.2/3 − 4/9 =
  10. 10.A bottle has 1/3 litre of juice. Arjun drinks 1/7 litre. How much juice is left (in litres)? =
  11. 11.7/10 − 1/2 =
  12. 12.1/3 − 1/8 =
  13. 13.A tank is 7/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  14. 14.1/2 − 1/9 =
  15. 15.8/9 − 2/3 =
  16. 16.A bottle has 2/5 litre of juice. Meera drinks 3/10 litre. How much juice is left (in litres)? =
  17. 17.A tank is 5/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  18. 18.4/5 − 1/4 =
  19. 19.1/4 − 1/5 =
  20. 20.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? =
  21. 21.Rohan has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  22. 22.8/9 − 5/6 =
  23. 23.A tank is 5/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  24. 24.8/9 − 1/6 =
  25. 25.5/6 − 1/4 =
  26. 26.Ishaan has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  27. 27.2/3 − 2/7 =
  28. 28.5/7 − 1/2 =
  29. 29.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  30. 30.3/4 − 5/8 =
  31. 31.Rohan has a ribbon 3/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  32. 32.1/2 − 3/8 =
  33. 33.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  34. 34.9/10 − 3/5 =
  35. 35.A bottle has 5/6 litre of juice. Diya drinks 3/5 litre. How much juice is left (in litres)? =
  36. 36.3/7 − 1/3 =
  37. 37.3/8 − 1/3 =
  38. 38.A bottle has 1/3 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  39. 39.7/9 − 1/3 =
  40. 40.Rohan has a ribbon 4/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =

Answer key

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

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