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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 347 · 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. 1.8/9 − 1/6 =
  2. 2.3/5 − 1/2 =
  3. 3.A tank is 6/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  4. 4.A tank is 3/4 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  5. 5.2/3 − 2/7 =
  6. 6.A bottle has 4/5 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  7. 7.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  8. 8.Kabir has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  9. 9.A bottle has 1/3 litre of juice. Diya drinks 1/10 litre. How much juice is left (in litres)? =
  10. 10.Aarav has a ribbon 2/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  11. 11.Kabir has a ribbon 1/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  12. 12.7/10 − 1/5 =
  13. 13.Meera has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  14. 14.Vihaan has a ribbon 3/4 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  15. 15.1/2 − 2/7 =
  16. 16.2/3 − 2/9 =
  17. 17.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  18. 18.4/7 − 1/2 =
  19. 19.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  20. 20.A bottle has 3/7 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  21. 21.A tank is 8/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  22. 22.4/5 − 7/10 =
  23. 23.A tank is 2/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  24. 24.A bottle has 3/5 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  25. 25.9/10 − 4/5 =
  26. 26.3/4 − 1/5 =
  27. 27.Kabir has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  28. 28.Rohan has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  29. 29.6/7 − 3/4 =
  30. 30.A bottle has 5/6 litre of juice. Aarav drinks 2/5 litre. How much juice is left (in litres)? =
  31. 31.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  32. 32.4/5 − 3/4 =
  33. 33.1/3 − 2/7 =
  34. 34.A tank is 5/6 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  35. 35.A bottle has 5/6 litre of juice. Diya drinks 5/9 litre. How much juice is left (in litres)? =
  36. 36.Diya has a ribbon 4/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  37. 37.8/9 − 5/6 =
  38. 38.A bottle has 4/7 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  39. 39.7/8 − 2/3 =
  40. 40.A bottle has 1/6 litre of juice. Ishaan drinks 1/8 litre. How much juice is left (in litres)? =

Answer key

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

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