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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 115 · 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 5/9 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  2. 2.3/4 − 2/7 =
  3. 3.A bottle has 3/4 litre of juice. Rohan drinks 5/7 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 6/7 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  5. 5.1/2 − 2/7 =
  6. 6.2/3 − 5/9 =
  7. 7.A bottle has 1/3 litre of juice. Vihaan drinks 3/10 litre. How much juice is left (in litres)? =
  8. 8.4/5 − 2/3 =
  9. 9.A tank is 3/4 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  10. 10.5/7 − 2/3 =
  11. 11.A tank is 7/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  12. 12.8/9 − 1/6 =
  13. 13.2/3 − 1/4 =
  14. 14.Ishaan has a ribbon 1/2 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  15. 15.3/7 − 1/3 =
  16. 16.Anaya has a ribbon 1/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  17. 17.4/7 − 1/2 =
  18. 18.Riya has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  19. 19.6/7 − 1/4 =
  20. 20.4/5 − 3/10 =
  21. 21.7/10 − 1/2 =
  22. 22.A bottle has 5/9 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 3/4 litre of juice. Sara drinks 3/5 litre. How much juice is left (in litres)? =
  24. 24.A bottle has 3/4 litre of juice. Tara drinks 3/5 litre. How much juice is left (in litres)? =
  25. 25.9/10 − 3/5 =
  26. 26.A bottle has 6/7 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  27. 27.Kabir has a ribbon 3/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  28. 28.7/9 − 2/3 =
  29. 29.A bottle has 8/9 litre of juice. Ishaan drinks 2/3 litre. How much juice is left (in litres)? =
  30. 30.A bottle has 5/7 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  31. 31.9/10 − 4/5 =
  32. 32.A tank is 5/6 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  33. 33.Sara has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  34. 34.4/9 − 1/6 =
  35. 35.3/4 − 5/8 =
  36. 36.7/8 − 1/6 =
  37. 37.2/3 − 1/10 =
  38. 38.Ishaan has a ribbon 4/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  39. 39.8/9 − 1/2 =
  40. 40.A bottle has 2/3 litre of juice. Tara drinks 2/7 litre. How much juice is left (in litres)? =

Answer key

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

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