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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 649 · 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 − 1/6 =
  2. 2.Vihaan has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  3. 3.2/3 − 5/8 =
  4. 4.Diya has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  5. 5.3/8 − 1/6 =
  6. 6.7/8 − 1/2 =
  7. 7.7/9 − 1/2 =
  8. 8.3/5 − 1/2 =
  9. 9.4/5 − 1/2 =
  10. 10.A bottle has 5/6 litre of juice. Riya drinks 2/5 litre. How much juice is left (in litres)? =
  11. 11.A tank is 1/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  12. 12.Rohan has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  13. 13.A bottle has 5/6 litre of juice. Sara drinks 7/9 litre. How much juice is left (in litres)? =
  14. 14.6/7 − 1/3 =
  15. 15.8/9 − 1/3 =
  16. 16.2/3 − 1/7 =
  17. 17.9/10 − 4/5 =
  18. 18.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  19. 19.2/7 − 1/4 =
  20. 20.A bottle has 2/3 litre of juice. Diya drinks 4/7 litre. How much juice is left (in litres)? =
  21. 21.7/10 − 3/5 =
  22. 22.7/8 − 5/6 =
  23. 23.Meera has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  24. 24.A bottle has 5/7 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  25. 25.2/3 − 5/9 =
  26. 26.A tank is 1/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  27. 27.7/10 − 2/3 =
  28. 28.6/7 − 1/4 =
  29. 29.A bottle has 1/3 litre of juice. Arjun drinks 2/7 litre. How much juice is left (in litres)? =
  30. 30.Arjun has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  31. 31.2/5 − 1/6 =
  32. 32.A bottle has 4/5 litre of juice. Meera drinks 3/10 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 6/7 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  34. 34.1/2 − 4/9 =
  35. 35.5/7 − 2/3 =
  36. 36.2/3 − 2/5 =
  37. 37.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? =
  38. 38.7/10 − 1/6 =
  39. 39.A bottle has 3/5 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  40. 40.A bottle has 3/4 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =

Answer key

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

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