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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 804 · 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. 1.1/4 − 1/6 =
  2. 2.3/4 − 2/3 =
  3. 3.3/5 − 3/10 =
  4. 4.5/6 − 5/9 =
  5. 5.4/5 − 3/10 =
  6. 6.Ishaan has a ribbon 3/4 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  7. 7.A tank is 8/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  8. 8.A bottle has 7/9 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  9. 9.1/2 − 2/9 =
  10. 10.A bottle has 2/3 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  11. 11.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  12. 12.2/5 − 1/10 =
  13. 13.3/5 − 1/6 =
  14. 14.Rohan has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  15. 15.A tank is 3/4 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  16. 16.A tank is 2/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  17. 17.4/5 − 1/3 =
  18. 18.2/3 − 3/10 =
  19. 19.5/6 − 3/5 =
  20. 20.3/8 − 1/3 =
  21. 21.A tank is 1/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  22. 22.A bottle has 3/4 litre of juice. Riya drinks 2/5 litre. How much juice is left (in litres)? =
  23. 23.1/4 − 1/8 =
  24. 24.A bottle has 3/4 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  25. 25.Vihaan has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  26. 26.1/3 − 1/9 =
  27. 27.9/10 − 1/4 =
  28. 28.5/7 − 1/2 =
  29. 29.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  30. 30.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  31. 31.9/10 − 1/3 =
  32. 32.Aarav has a ribbon 3/4 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  33. 33.6/7 − 2/3 =
  34. 34.2/7 − 1/4 =
  35. 35.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  36. 36.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  37. 37.A tank is 4/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 3/4 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  39. 39.9/10 − 5/6 =
  40. 40.1/3 − 1/6 =

Answer key

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

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