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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 403 · 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 − 2/5 =
  2. 2.5/6 − 3/5 =
  3. 3.A bottle has 1/2 litre of juice. Ishaan drinks 1/7 litre. How much juice is left (in litres)? =
  4. 4.Kabir has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  5. 5.1/4 − 1/5 =
  6. 6.Vihaan has a ribbon 2/3 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  7. 7.A bottle has 3/10 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  8. 8.3/4 − 1/3 =
  9. 9.2/3 − 2/9 =
  10. 10.Rohan has a ribbon 5/6 m long and cuts off 7/9 m. How long is the ribbon now (in m)? =
  11. 11.A bottle has 7/10 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  12. 12.5/6 − 5/9 =
  13. 13.A bottle has 5/6 litre of juice. Diya drinks 4/5 litre. How much juice is left (in litres)? =
  14. 14.Arjun has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  15. 15.A tank is 7/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  16. 16.7/10 − 1/2 =
  17. 17.5/6 − 7/10 =
  18. 18.Tara has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  19. 19.2/5 − 3/10 =
  20. 20.Ishaan has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  21. 21.A bottle has 2/3 litre of juice. Sara drinks 3/7 litre. How much juice is left (in litres)? =
  22. 22.9/10 − 5/6 =
  23. 23.3/4 − 2/7 =
  24. 24.2/3 − 1/8 =
  25. 25.3/4 − 1/5 =
  26. 26.4/9 − 1/6 =
  27. 27.A bottle has 3/4 litre of juice. Ishaan drinks 5/7 litre. How much juice is left (in litres)? =
  28. 28.3/4 − 1/7 =
  29. 29.1/3 − 1/8 =
  30. 30.5/6 − 1/5 =
  31. 31.2/3 − 3/7 =
  32. 32.Anaya has a ribbon 3/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  33. 33.3/7 − 1/4 =
  34. 34.7/9 − 1/2 =
  35. 35.A bottle has 2/3 litre of juice. Diya drinks 3/8 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 3/4 litre of juice. Kabir drinks 3/8 litre. How much juice is left (in litres)? =
  37. 37.Arjun has a ribbon 7/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  38. 38.2/5 − 1/4 =
  39. 39.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? =
  40. 40.3/4 − 1/10 =

Answer key

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

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