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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 647 · 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. 1.3/8 − 1/6 =
  2. 2.7/9 − 1/3 =
  3. 3.4/7 − 1/3 =
  4. 4.A bottle has 5/7 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  5. 5.5/6 − 1/3 =
  6. 6.Ishaan has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  7. 7.3/4 − 3/5 =
  8. 8.4/5 − 1/6 =
  9. 9.5/7 − 1/2 =
  10. 10.3/8 − 1/4 =
  11. 11.Meera has a ribbon 7/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  12. 12.5/7 − 2/3 =
  13. 13.1/5 − 1/6 =
  14. 14.A bottle has 1/3 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  15. 15.2/3 − 1/7 =
  16. 16.6/7 − 3/4 =
  17. 17.3/4 − 7/10 =
  18. 18.A bottle has 5/6 litre of juice. Riya drinks 2/3 litre. How much juice is left (in litres)? =
  19. 19.9/10 − 3/4 =
  20. 20.1/3 − 1/4 =
  21. 21.3/10 − 1/5 =
  22. 22.A tank is 5/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  23. 23.3/4 − 2/5 =
  24. 24.A bottle has 1/2 litre of juice. Sara drinks 1/10 litre. How much juice is left (in litres)? =
  25. 25.Riya has a ribbon 5/6 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  26. 26.Meera has a ribbon 2/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  27. 27.Kabir has a ribbon 5/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  28. 28.5/6 − 1/9 =
  29. 29.A bottle has 2/3 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  30. 30.5/6 − 7/10 =
  31. 31.1/2 − 3/7 =
  32. 32.A tank is 6/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  33. 33.A tank is 5/6 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  34. 34.Tara has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  35. 35.A tank is 7/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  36. 36.A bottle has 9/10 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  37. 37.Arjun has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  38. 38.5/6 − 1/5 =
  39. 39.A bottle has 4/5 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  40. 40.A tank is 1/2 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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