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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 839 · 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 4/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  2. 2.2/3 − 1/9 =
  3. 3.4/5 − 1/6 =
  4. 4.3/4 − 5/8 =
  5. 5.A bottle has 3/4 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  6. 6.Riya has a ribbon 4/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  7. 7.2/3 − 3/10 =
  8. 8.3/10 − 1/6 =
  9. 9.Tara has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  10. 10.5/6 − 1/4 =
  11. 11.A bottle has 1/2 litre of juice. Sara drinks 2/7 litre. How much juice is left (in litres)? =
  12. 12.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  13. 13.A bottle has 1/2 litre of juice. Rohan drinks 1/7 litre. How much juice is left (in litres)? =
  14. 14.Rohan has a ribbon 7/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  15. 15.4/5 − 3/4 =
  16. 16.7/9 − 1/3 =
  17. 17.5/7 − 1/2 =
  18. 18.A bottle has 3/4 litre of juice. Aarav drinks 1/7 litre. How much juice is left (in litres)? =
  19. 19.4/9 − 1/3 =
  20. 20.1/4 − 1/7 =
  21. 21.1/3 − 1/4 =
  22. 22.Meera has a ribbon 1/2 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  23. 23.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? =
  24. 24.A tank is 1/3 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 5/6 litre of juice. Tara drinks 1/8 litre. How much juice is left (in litres)? =
  26. 26.9/10 − 3/4 =
  27. 27.7/8 − 5/6 =
  28. 28.A bottle has 1/3 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  29. 29.1/2 − 1/7 =
  30. 30.Sara has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  31. 31.6/7 − 1/4 =
  32. 32.Vihaan has a ribbon 3/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  33. 33.2/5 − 1/4 =
  34. 34.Kabir has a ribbon 5/6 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  35. 35.4/7 − 1/2 =
  36. 36.A tank is 5/6 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  37. 37.5/9 − 1/3 =
  38. 38.5/9 − 1/6 =
  39. 39.5/6 − 1/3 =
  40. 40.2/3 − 5/9 =

Answer key

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

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