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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 479 · 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 bottle has 5/6 litre of juice. Rohan drinks 3/5 litre. How much juice is left (in litres)? =
  2. 2.1/2 − 1/7 =
  3. 3.Arjun has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  4. 4.1/4 − 1/10 =
  5. 5.A bottle has 2/3 litre of juice. Vihaan drinks 3/8 litre. How much juice is left (in litres)? =
  6. 6.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? =
  7. 7.A bottle has 9/10 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  8. 8.5/6 − 1/2 =
  9. 9.5/6 − 2/9 =
  10. 10.2/3 − 1/8 =
  11. 11.Riya has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  12. 12.2/3 − 4/7 =
  13. 13.A bottle has 9/10 litre of juice. Diya drinks 3/5 litre. How much juice is left (in litres)? =
  14. 14.7/10 − 2/3 =
  15. 15.2/5 − 1/4 =
  16. 16.A bottle has 3/4 litre of juice. Arjun drinks 1/8 litre. How much juice is left (in litres)? =
  17. 17.9/10 − 1/6 =
  18. 18.9/10 − 1/5 =
  19. 19.2/3 − 5/8 =
  20. 20.Rohan has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  21. 21.6/7 − 1/2 =
  22. 22.A bottle has 3/4 litre of juice. Ishaan drinks 2/5 litre. How much juice is left (in litres)? =
  23. 23.Diya has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  24. 24.7/10 − 1/4 =
  25. 25.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  26. 26.2/3 − 4/9 =
  27. 27.A tank is 2/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  28. 28.6/7 − 1/4 =
  29. 29.Ishaan has a ribbon 5/6 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  30. 30.1/3 − 2/9 =
  31. 31.9/10 − 2/5 =
  32. 32.3/5 − 1/2 =
  33. 33.3/4 − 5/7 =
  34. 34.A bottle has 3/10 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  35. 35.1/2 − 1/9 =
  36. 36.A bottle has 5/6 litre of juice. Vihaan drinks 4/9 litre. How much juice is left (in litres)? =
  37. 37.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? =
  38. 38.A tank is 1/2 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  39. 39.1/6 − 1/8 =
  40. 40.8/9 − 1/2 =

Answer key

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

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