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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 158 · 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. 1.4/5 − 3/4 =
  2. 2.A bottle has 4/5 litre of juice. Sara drinks 7/10 litre. How much juice is left (in litres)? =
  3. 3.Diya has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  4. 4.A bottle has 8/9 litre of juice. Diya drinks 2/3 litre. How much juice is left (in litres)? =
  5. 5.2/3 − 1/9 =
  6. 6.A tank is 5/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  7. 7.5/6 − 7/9 =
  8. 8.A bottle has 1/2 litre of juice. Sara drinks 1/7 litre. How much juice is left (in litres)? =
  9. 9.2/3 − 1/5 =
  10. 10.8/9 − 1/3 =
  11. 11.A tank is 7/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  12. 12.A tank is 4/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  13. 13.9/10 − 2/3 =
  14. 14.A bottle has 8/9 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  15. 15.3/4 − 2/7 =
  16. 16.A bottle has 3/5 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  17. 17.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? =
  18. 18.2/3 − 4/7 =
  19. 19.2/9 − 1/6 =
  20. 20.3/4 − 1/7 =
  21. 21.A tank is 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  22. 22.3/8 − 1/6 =
  23. 23.7/9 − 1/6 =
  24. 24.7/8 − 1/6 =
  25. 25.5/6 − 3/4 =
  26. 26.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  27. 27.Kabir has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 5/7 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  29. 29.9/10 − 1/6 =
  30. 30.A bottle has 4/9 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  31. 31.A bottle has 1/2 litre of juice. Meera drinks 2/9 litre. How much juice is left (in litres)? =
  32. 32.5/6 − 1/5 =
  33. 33.3/5 − 1/10 =
  34. 34.7/8 − 1/3 =
  35. 35.6/7 − 1/4 =
  36. 36.1/3 − 2/7 =
  37. 37.1/2 − 3/7 =
  38. 38.7/9 − 1/2 =
  39. 39.3/4 − 2/5 =
  40. 40.A bottle has 3/4 litre of juice. Diya drinks 3/7 litre. How much juice is left (in litres)? =

Answer key

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

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