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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 65 · 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. 1.3/7 − 1/4 =
  2. 2.1/2 − 1/4 =
  3. 3.5/6 − 2/5 =
  4. 4.A bottle has 4/7 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  5. 5.Kabir has a ribbon 4/5 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  6. 6.Arjun has a ribbon 5/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  7. 7.5/8 − 1/2 =
  8. 8.1/3 − 2/9 =
  9. 9.6/7 − 3/4 =
  10. 10.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  11. 11.4/5 − 1/2 =
  12. 12.5/6 − 4/5 =
  13. 13.1/2 − 1/3 =
  14. 14.2/3 − 3/10 =
  15. 15.1/2 − 3/8 =
  16. 16.Tara has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  17. 17.3/4 − 1/7 =
  18. 18.1/3 − 1/9 =
  19. 19.A bottle has 1/4 litre of juice. Diya drinks 1/7 litre. How much juice is left (in litres)? =
  20. 20.3/5 − 1/4 =
  21. 21.7/9 − 1/2 =
  22. 22.A bottle has 1/3 litre of juice. Diya drinks 1/9 litre. How much juice is left (in litres)? =
  23. 23.2/3 − 4/9 =
  24. 24.A tank is 5/6 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  25. 25.1/3 − 1/7 =
  26. 26.1/4 − 1/8 =
  27. 27.1/3 − 1/8 =
  28. 28.A tank is 1/2 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  29. 29.Diya has a ribbon 1/3 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  30. 30.7/8 − 5/6 =
  31. 31.Tara has a ribbon 5/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  32. 32.Arjun has a ribbon 3/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  33. 33.A bottle has 7/8 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  34. 34.7/9 − 1/3 =
  35. 35.5/6 − 2/9 =
  36. 36.2/3 − 1/8 =
  37. 37.A bottle has 3/7 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  38. 38.A tank is 3/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  39. 39.5/6 − 1/5 =
  40. 40.5/6 − 3/8 =

Answer key

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

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