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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 561 · 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. 1.2/3 − 2/5 =
  2. 2.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  3. 3.3/4 − 7/10 =
  4. 4.9/10 − 3/5 =
  5. 5.Rohan has a ribbon 5/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  6. 6.A bottle has 3/4 litre of juice. Kabir drinks 5/8 litre. How much juice is left (in litres)? =
  7. 7.5/6 − 1/2 =
  8. 8.4/5 − 1/4 =
  9. 9.A tank is 4/5 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  10. 10.5/6 − 2/5 =
  11. 11.A bottle has 5/8 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  12. 12.9/10 − 1/4 =
  13. 13.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  14. 14.4/7 − 1/2 =
  15. 15.A bottle has 5/6 litre of juice. Kabir drinks 4/9 litre. How much juice is left (in litres)? =
  16. 16.9/10 − 2/5 =
  17. 17.5/9 − 1/6 =
  18. 18.Arjun has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  19. 19.1/2 − 1/7 =
  20. 20.Riya has a ribbon 2/3 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  21. 21.1/2 − 2/5 =
  22. 22.3/4 − 1/3 =
  23. 23.4/5 − 3/4 =
  24. 24.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? =
  25. 25.A bottle has 8/9 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  26. 26.3/4 − 3/5 =
  27. 27.A tank is 4/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  28. 28.A tank is 9/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  29. 29.5/6 − 5/8 =
  30. 30.A bottle has 5/8 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  31. 31.9/10 − 1/3 =
  32. 32.A bottle has 2/5 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.2/3 − 4/9 =
  34. 34.3/4 − 1/8 =
  35. 35.5/6 − 2/9 =
  36. 36.3/8 − 1/4 =
  37. 37.2/3 − 3/7 =
  38. 38.Ishaan has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  39. 39.2/3 − 1/2 =
  40. 40.Diya has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =

Answer key

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

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