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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 327 · 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. 1.2/5 − 3/10 =
  2. 2.Arjun has a ribbon 3/4 m long and cuts off 5/7 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 1/2 litre of juice. Riya drinks 1/8 litre. How much juice is left (in litres)? =
  4. 4.7/8 − 3/4 =
  5. 5.A bottle has 1/3 litre of juice. Diya drinks 1/8 litre. How much juice is left (in litres)? =
  6. 6.5/9 − 1/2 =
  7. 7.6/7 − 1/4 =
  8. 8.Diya has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  9. 9.3/10 − 1/5 =
  10. 10.1/2 − 1/6 =
  11. 11.A bottle has 1/2 litre of juice. Kabir drinks 4/9 litre. How much juice is left (in litres)? =
  12. 12.2/5 − 1/3 =
  13. 13.5/6 − 7/9 =
  14. 14.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? =
  15. 15.A tank is 5/6 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  16. 16.5/8 − 1/3 =
  17. 17.3/4 − 2/5 =
  18. 18.2/3 − 1/4 =
  19. 19.A bottle has 1/6 litre of juice. Riya drinks 1/9 litre. How much juice is left (in litres)? =
  20. 20.A bottle has 5/6 litre of juice. Diya drinks 2/9 litre. How much juice is left (in litres)? =
  21. 21.A tank is 1/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  22. 22.2/3 − 1/9 =
  23. 23.Diya has a ribbon 4/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  24. 24.5/7 − 1/2 =
  25. 25.A bottle has 3/10 litre of juice. Kabir drinks 1/5 litre. How much juice is left (in litres)? =
  26. 26.3/8 − 1/3 =
  27. 27.A bottle has 3/4 litre of juice. Ishaan drinks 5/8 litre. How much juice is left (in litres)? =
  28. 28.Arjun has a ribbon 5/6 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  29. 29.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? =
  30. 30.1/2 − 2/7 =
  31. 31.7/8 − 1/2 =
  32. 32.3/8 − 1/6 =
  33. 33.A bottle has 3/4 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  34. 34.A tank is 2/3 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  35. 35.4/7 − 1/4 =
  36. 36.4/5 − 3/10 =
  37. 37.1/3 − 1/7 =
  38. 38.Ishaan has a ribbon 1/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  39. 39.9/10 − 3/5 =
  40. 40.3/4 − 1/7 =

Answer key

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

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