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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 337 · 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 2/5 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  2. 2.3/4 − 1/5 =
  3. 3.3/4 − 7/10 =
  4. 4.A bottle has 3/4 litre of juice. Aarav drinks 2/7 litre. How much juice is left (in litres)? =
  5. 5.9/10 − 4/5 =
  6. 6.1/5 − 1/6 =
  7. 7.Kabir has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  8. 8.Arjun has a ribbon 3/4 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  9. 9.1/2 − 3/10 =
  10. 10.2/3 − 4/7 =
  11. 11.2/3 − 1/4 =
  12. 12.A bottle has 1/4 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 1/3 litre of juice. Sara drinks 3/10 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 5/8 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  15. 15.8/9 − 1/2 =
  16. 16.A bottle has 1/3 litre of juice. Riya drinks 1/8 litre. How much juice is left (in litres)? =
  17. 17.3/5 − 3/10 =
  18. 18.7/8 − 2/3 =
  19. 19.2/3 − 2/5 =
  20. 20.A bottle has 1/2 litre of juice. Tara drinks 1/8 litre. How much juice is left (in litres)? =
  21. 21.8/9 − 1/3 =
  22. 22.1/2 − 1/9 =
  23. 23.A bottle has 1/2 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =
  24. 24.A tank is 2/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  25. 25.5/6 − 7/10 =
  26. 26.6/7 − 3/4 =
  27. 27.5/6 − 1/5 =
  28. 28.7/9 − 1/2 =
  29. 29.Ishaan has a ribbon 1/2 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  30. 30.A tank is 3/4 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  31. 31.3/4 − 2/5 =
  32. 32.7/8 − 3/4 =
  33. 33.A bottle has 4/5 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  34. 34.Anaya has a ribbon 5/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  35. 35.Tara has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  36. 36.Tara has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 1/3 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  38. 38.Kabir has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 1/5 litre of juice. Rohan drinks 1/10 litre. How much juice is left (in litres)? =
  40. 40.A bottle has 7/8 litre of juice. Diya drinks 3/4 litre. How much juice is left (in litres)? =

Answer key

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

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