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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 201 · 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.Rohan has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  2. 2.1/2 − 1/10 =
  3. 3.2/3 − 5/9 =
  4. 4.Diya has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  5. 5.2/3 − 1/6 =
  6. 6.A bottle has 5/7 litre of juice. Anaya drinks 2/3 litre. How much juice is left (in litres)? =
  7. 7.A bottle has 7/9 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  8. 8.Aarav has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  9. 9.3/10 − 1/4 =
  10. 10.3/4 − 4/7 =
  11. 11.A bottle has 1/2 litre of juice. Riya drinks 4/9 litre. How much juice is left (in litres)? =
  12. 12.A bottle has 6/7 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  13. 13.A tank is 8/9 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  14. 14.4/9 − 1/3 =
  15. 15.Arjun has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  16. 16.8/9 − 1/3 =
  17. 17.3/4 − 5/7 =
  18. 18.3/4 − 1/6 =
  19. 19.2/7 − 1/4 =
  20. 20.A tank is 3/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  21. 21.A bottle has 1/3 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  22. 22.2/5 − 3/10 =
  23. 23.3/8 − 1/6 =
  24. 24.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? =
  25. 25.A tank is 9/10 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  26. 26.6/7 − 2/3 =
  27. 27.A bottle has 5/6 litre of juice. Anaya drinks 3/8 litre. How much juice is left (in litres)? =
  28. 28.Aarav has a ribbon 4/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  29. 29.A bottle has 6/7 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  30. 30.4/5 − 3/4 =
  31. 31.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  32. 32.1/2 − 1/9 =
  33. 33.2/3 − 4/9 =
  34. 34.1/4 − 1/7 =
  35. 35.Kabir has a ribbon 7/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  36. 36.7/9 − 1/2 =
  37. 37.Tara has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  38. 38.3/4 − 2/5 =
  39. 39.Anaya has a ribbon 1/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  40. 40.7/8 − 1/3 =

Answer key

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

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