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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 293 · 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 − 1/10 =
  2. 2.A bottle has 1/2 litre of juice. Rohan drinks 4/9 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 7/8 litre of juice. Aarav drinks 5/6 litre. How much juice is left (in litres)? =
  4. 4.6/7 − 1/4 =
  5. 5.A bottle has 5/8 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 6/7 litre of juice. Aarav drinks 3/4 litre. How much juice is left (in litres)? =
  7. 7.3/4 − 2/7 =
  8. 8.5/6 − 4/9 =
  9. 9.Riya has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  10. 10.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  11. 11.1/3 − 1/8 =
  12. 12.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  13. 13.A bottle has 6/7 litre of juice. Arjun drinks 3/4 litre. How much juice is left (in litres)? =
  14. 14.6/7 − 1/3 =
  15. 15.1/2 − 1/7 =
  16. 16.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? =
  17. 17.3/4 − 1/7 =
  18. 18.1/4 − 1/8 =
  19. 19.A tank is 5/6 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  20. 20.A bottle has 9/10 litre of juice. Tara drinks 1/5 litre. How much juice is left (in litres)? =
  21. 21.2/3 − 1/5 =
  22. 22.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  23. 23.3/5 − 1/2 =
  24. 24.Rohan has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  25. 25.3/5 − 1/3 =
  26. 26.A tank is 1/2 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  27. 27.Tara has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  28. 28.3/10 − 1/6 =
  29. 29.5/6 − 5/8 =
  30. 30.4/5 − 1/4 =
  31. 31.A bottle has 7/10 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  32. 32.A tank is 1/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  33. 33.1/2 − 3/7 =
  34. 34.A bottle has 7/8 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  35. 35.5/6 − 3/5 =
  36. 36.1/3 − 1/10 =
  37. 37.A bottle has 4/5 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  38. 38.A tank is 7/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  39. 39.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? =
  40. 40.3/10 − 1/5 =

Answer key

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

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