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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 243 · 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 1/5 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  2. 2.2/3 − 3/7 =
  3. 3.1/5 − 1/10 =
  4. 4.9/10 − 1/6 =
  5. 5.3/4 − 2/7 =
  6. 6.A bottle has 2/3 litre of juice. Rohan drinks 2/7 litre. How much juice is left (in litres)? =
  7. 7.1/2 − 2/7 =
  8. 8.7/8 − 3/4 =
  9. 9.A tank is 7/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  10. 10.3/10 − 1/5 =
  11. 11.A bottle has 3/7 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  12. 12.Riya has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  13. 13.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  14. 14.1/4 − 1/10 =
  15. 15.3/4 − 3/5 =
  16. 16.Vihaan has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 3/4 litre of juice. Rohan drinks 3/7 litre. How much juice is left (in litres)? =
  18. 18.Sara has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  19. 19.Aarav has a ribbon 5/6 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  20. 20.4/7 − 1/3 =
  21. 21.7/8 − 1/3 =
  22. 22.A bottle has 2/3 litre of juice. Diya drinks 1/9 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 3/4 litre of juice. Sara drinks 4/7 litre. How much juice is left (in litres)? =
  24. 24.A bottle has 5/8 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  25. 25.3/10 − 1/4 =
  26. 26.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  27. 27.4/7 − 1/4 =
  28. 28.A tank is 7/8 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  29. 29.1/2 − 2/9 =
  30. 30.Rohan has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  31. 31.Meera has a ribbon 7/10 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  32. 32.7/9 − 1/3 =
  33. 33.5/6 − 4/9 =
  34. 34.A bottle has 3/4 litre of juice. Arjun drinks 5/8 litre. How much juice is left (in litres)? =
  35. 35.A tank is 7/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  36. 36.1/4 − 1/7 =
  37. 37.3/7 − 1/4 =
  38. 38.5/6 − 5/9 =
  39. 39.3/4 − 5/7 =
  40. 40.A bottle has 2/3 litre of juice. Tara drinks 2/5 litre. How much juice is left (in litres)? =

Answer key

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

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