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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 222 · 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. 1.5/6 − 4/9 =
  2. 2.A bottle has 7/8 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  3. 3.7/8 − 2/3 =
  4. 4.5/7 − 1/4 =
  5. 5.5/7 − 1/3 =
  6. 6.3/4 − 1/8 =
  7. 7.4/7 − 1/4 =
  8. 8.4/5 − 1/2 =
  9. 9.A bottle has 2/3 litre of juice. Arjun drinks 1/9 litre. How much juice is left (in litres)? =
  10. 10.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? =
  11. 11.A tank is 1/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  12. 12.A tank is 5/6 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  13. 13.7/8 − 1/3 =
  14. 14.5/6 − 2/5 =
  15. 15.Ishaan has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  16. 16.1/2 − 2/7 =
  17. 17.A tank is 3/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  18. 18.3/7 − 1/4 =
  19. 19.1/3 − 1/10 =
  20. 20.A bottle has 3/5 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  21. 21.A bottle has 2/3 litre of juice. Sara drinks 5/8 litre. How much juice is left (in litres)? =
  22. 22.A bottle has 4/5 litre of juice. Ishaan drinks 7/10 litre. How much juice is left (in litres)? =
  23. 23.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  24. 24.3/4 − 4/7 =
  25. 25.Diya has a ribbon 5/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  26. 26.1/2 − 3/10 =
  27. 27.7/8 − 1/4 =
  28. 28.A tank is 1/2 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  29. 29.Aarav has a ribbon 1/2 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  30. 30.2/3 − 4/9 =
  31. 31.1/2 − 1/7 =
  32. 32.A bottle has 5/7 litre of juice. Sara drinks 2/3 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 1/2 litre of juice. Arjun drinks 3/10 litre. How much juice is left (in litres)? =
  34. 34.9/10 − 1/2 =
  35. 35.3/8 − 1/3 =
  36. 36.A bottle has 9/10 litre of juice. Ishaan drinks 3/4 litre. How much juice is left (in litres)? =
  37. 37.A tank is 3/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  38. 38.Riya has a ribbon 5/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  39. 39.7/9 − 1/6 =
  40. 40.2/3 − 1/6 =

Answer key

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

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