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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 613 · 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 − 1/5 =
  2. 2.Rohan has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  3. 3.4/5 − 1/2 =
  4. 4.Aarav has a ribbon 5/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  5. 5.2/3 − 1/7 =
  6. 6.A bottle has 3/7 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  7. 7.A bottle has 5/7 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  8. 8.2/9 − 1/6 =
  9. 9.1/3 − 1/5 =
  10. 10.Aarav has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  11. 11.4/7 − 1/2 =
  12. 12.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? =
  13. 13.3/8 − 1/4 =
  14. 14.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  15. 15.3/4 − 3/10 =
  16. 16.A bottle has 4/5 litre of juice. Arjun drinks 1/10 litre. How much juice is left (in litres)? =
  17. 17.A tank is 3/4 full of water. Then water filling 5/7 of the tank is used. What fraction of the tank is full now? =
  18. 18.A bottle has 5/6 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  19. 19.1/3 − 2/7 =
  20. 20.A bottle has 1/3 litre of juice. Diya drinks 1/8 litre. How much juice is left (in litres)? =
  21. 21.A tank is 9/10 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  22. 22.4/5 − 3/10 =
  23. 23.3/4 − 1/6 =
  24. 24.1/2 − 1/3 =
  25. 25.Diya has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  26. 26.1/2 − 3/8 =
  27. 27.1/2 − 1/9 =
  28. 28.Arjun has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  29. 29.5/9 − 1/2 =
  30. 30.4/5 − 1/3 =
  31. 31.Aarav has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  32. 32.A tank is 1/4 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  33. 33.2/3 − 1/6 =
  34. 34.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  35. 35.Riya has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  36. 36.A bottle has 8/9 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  37. 37.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? =
  38. 38.A bottle has 1/3 litre of juice. Vihaan drinks 1/7 litre. How much juice is left (in litres)? =
  39. 39.2/3 − 1/9 =
  40. 40.A tank is 5/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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