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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 377 · 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. 1.1/2 − 1/6 =
  2. 2.A bottle has 2/5 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  3. 3.1/3 − 2/7 =
  4. 4.7/8 − 2/3 =
  5. 5.Diya has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  6. 6.8/9 − 2/3 =
  7. 7.8/9 − 1/3 =
  8. 8.A bottle has 5/6 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  9. 9.9/10 − 1/4 =
  10. 10.Riya has a ribbon 1/2 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  11. 11.1/2 − 1/9 =
  12. 12.5/6 − 3/5 =
  13. 13.Riya has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  14. 14.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? =
  15. 15.2/3 − 2/5 =
  16. 16.2/3 − 3/10 =
  17. 17.A bottle has 5/6 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  18. 18.1/3 − 3/10 =
  19. 19.3/4 − 3/8 =
  20. 20.1/6 − 1/9 =
  21. 21.5/6 − 5/8 =
  22. 22.4/9 − 1/6 =
  23. 23.6/7 − 1/4 =
  24. 24.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  25. 25.A tank is 9/10 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  26. 26.1/2 − 2/7 =
  27. 27.A tank is 3/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  28. 28.4/9 − 1/3 =
  29. 29.A bottle has 2/3 litre of juice. Anaya drinks 3/5 litre. How much juice is left (in litres)? =
  30. 30.Meera has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  31. 31.A bottle has 4/7 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 2/5 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  33. 33.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? =
  34. 34.3/4 − 5/7 =
  35. 35.5/9 − 1/6 =
  36. 36.A tank is 4/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  37. 37.1/3 − 1/7 =
  38. 38.Ishaan has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 4/5 litre of juice. Rohan drinks 2/3 litre. How much juice is left (in litres)? =
  40. 40.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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