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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 430 · 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.Ishaan has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  2. 2.1/6 − 1/10 =
  3. 3.1/3 − 1/10 =
  4. 4.1/2 − 2/7 =
  5. 5.2/9 − 1/6 =
  6. 6.A bottle has 5/6 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  7. 7.Sara has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  8. 8.A tank is 3/4 full of water. Then water filling 5/7 of the tank is used. What fraction of the tank is full now? =
  9. 9.4/5 − 1/4 =
  10. 10.Tara has a ribbon 4/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  11. 11.2/3 − 3/8 =
  12. 12.Ishaan has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  13. 13.3/4 − 1/7 =
  14. 14.1/2 − 1/7 =
  15. 15.5/6 − 3/10 =
  16. 16.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  17. 17.A bottle has 2/3 litre of juice. Riya drinks 3/8 litre. How much juice is left (in litres)? =
  18. 18.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  19. 19.1/2 − 3/7 =
  20. 20.Rohan has a ribbon 3/4 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  21. 21.A bottle has 1/2 litre of juice. Diya drinks 2/7 litre. How much juice is left (in litres)? =
  22. 22.A bottle has 4/5 litre of juice. Rohan drinks 2/3 litre. How much juice is left (in litres)? =
  23. 23.5/9 − 1/6 =
  24. 24.1/2 − 3/8 =
  25. 25.3/5 − 1/4 =
  26. 26.1/6 − 1/9 =
  27. 27.7/8 − 5/6 =
  28. 28.A tank is 7/8 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  29. 29.7/9 − 1/2 =
  30. 30.1/3 − 2/7 =
  31. 31.A bottle has 9/10 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  32. 32.3/7 − 1/3 =
  33. 33.4/7 − 1/2 =
  34. 34.5/6 − 5/9 =
  35. 35.7/8 − 2/3 =
  36. 36.3/4 − 5/7 =
  37. 37.3/5 − 1/6 =
  38. 38.A bottle has 3/4 litre of juice. Riya drinks 4/7 litre. How much juice is left (in litres)? =
  39. 39.A tank is 9/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  40. 40.4/7 − 1/3 =

Answer key

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

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