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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 981 · 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.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? =
  2. 2.3/4 − 1/2 =
  3. 3.Rohan has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  4. 4.7/10 − 2/5 =
  5. 5.A bottle has 3/5 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  6. 6.Anaya has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  7. 7.A bottle has 3/4 litre of juice. Arjun drinks 5/8 litre. How much juice is left (in litres)? =
  8. 8.Vihaan has a ribbon 7/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  9. 9.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? =
  10. 10.2/3 − 5/8 =
  11. 11.1/2 − 4/9 =
  12. 12.A tank is 9/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  13. 13.5/8 − 1/4 =
  14. 14.7/8 − 1/6 =
  15. 15.A bottle has 5/9 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  16. 16.9/10 − 5/6 =
  17. 17.4/5 − 7/10 =
  18. 18.A bottle has 5/8 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  19. 19.A tank is 8/9 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  20. 20.Arjun has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  21. 21.7/10 − 1/2 =
  22. 22.2/3 − 3/10 =
  23. 23.A tank is 4/5 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  24. 24.A tank is 3/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  25. 25.5/6 − 2/9 =
  26. 26.Rohan has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  27. 27.A bottle has 6/7 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  28. 28.A bottle has 9/10 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  29. 29.3/8 − 1/6 =
  30. 30.2/5 − 1/10 =
  31. 31.Meera has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  32. 32.3/4 − 1/7 =
  33. 33.7/9 − 1/3 =
  34. 34.3/4 − 1/5 =
  35. 35.2/3 − 2/7 =
  36. 36.4/9 − 1/3 =
  37. 37.7/9 − 1/6 =
  38. 38.1/2 − 2/5 =
  39. 39.A tank is 3/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  40. 40.Meera has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =

Answer key

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

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