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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 696 · 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. 1.6/7 − 1/2 =
  2. 2.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? =
  3. 3.7/8 − 1/3 =
  4. 4.1/4 − 1/6 =
  5. 5.A bottle has 2/3 litre of juice. Ishaan drinks 5/9 litre. How much juice is left (in litres)? =
  6. 6.5/6 − 2/9 =
  7. 7.4/5 − 7/10 =
  8. 8.2/7 − 1/4 =
  9. 9.5/6 − 1/9 =
  10. 10.A tank is 4/9 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 5/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  12. 12.A bottle has 1/2 litre of juice. Ishaan drinks 2/9 litre. How much juice is left (in litres)? =
  13. 13.9/10 − 2/5 =
  14. 14.A bottle has 1/2 litre of juice. Riya drinks 1/7 litre. How much juice is left (in litres)? =
  15. 15.A bottle has 5/8 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  16. 16.A tank is 1/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  17. 17.4/9 − 1/6 =
  18. 18.A tank is 5/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  19. 19.6/7 − 1/4 =
  20. 20.Kabir has a ribbon 2/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  21. 21.9/10 − 1/2 =
  22. 22.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  23. 23.2/3 − 2/9 =
  24. 24.A bottle has 5/8 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  25. 25.1/2 − 1/3 =
  26. 26.5/6 − 3/5 =
  27. 27.1/3 − 1/9 =
  28. 28.9/10 − 5/6 =
  29. 29.5/6 − 1/4 =
  30. 30.A bottle has 3/4 litre of juice. Ishaan drinks 4/7 litre. How much juice is left (in litres)? =
  31. 31.3/4 − 3/10 =
  32. 32.A bottle has 4/9 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 1/4 litre of juice. Kabir drinks 1/7 litre. How much juice is left (in litres)? =
  34. 34.Arjun has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  35. 35.3/4 − 5/7 =
  36. 36.7/8 − 1/4 =
  37. 37.1/2 − 2/9 =
  38. 38.1/3 − 1/10 =
  39. 39.2/3 − 4/9 =
  40. 40.1/2 − 4/9 =

Answer key

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

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