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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 698 · 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. 1.2/3 − 1/9 =
  2. 2.4/9 − 1/3 =
  3. 3.6/7 − 3/4 =
  4. 4.Riya has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  5. 5.Diya has a ribbon 5/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  6. 6.A tank is 3/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  7. 7.5/6 − 7/9 =
  8. 8.A tank is 7/8 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  9. 9.A tank is 1/2 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  10. 10.3/5 − 1/2 =
  11. 11.2/3 − 1/7 =
  12. 12.A bottle has 3/4 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  13. 13.5/9 − 1/2 =
  14. 14.1/2 − 1/7 =
  15. 15.A tank is 3/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  16. 16.3/8 − 1/4 =
  17. 17.A bottle has 1/3 litre of juice. Rohan drinks 2/9 litre. How much juice is left (in litres)? =
  18. 18.3/5 − 1/4 =
  19. 19.Tara has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  20. 20.2/3 − 4/9 =
  21. 21.1/2 − 3/7 =
  22. 22.3/4 − 2/7 =
  23. 23.Aarav has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  24. 24.A tank is 2/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  25. 25.5/6 − 4/5 =
  26. 26.A bottle has 4/5 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  27. 27.A bottle has 2/3 litre of juice. Sara drinks 1/10 litre. How much juice is left (in litres)? =
  28. 28.9/10 − 1/5 =
  29. 29.A bottle has 5/9 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  30. 30.3/4 − 1/7 =
  31. 31.A bottle has 4/5 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 1/2 litre of juice. Ishaan drinks 1/8 litre. How much juice is left (in litres)? =
  33. 33.7/8 − 1/4 =
  34. 34.Kabir has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  35. 35.A tank is 1/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  36. 36.A bottle has 1/2 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  37. 37.7/8 − 2/3 =
  38. 38.7/9 − 1/2 =
  39. 39.2/3 − 3/7 =
  40. 40.A tank is 9/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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