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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 75 · 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 5/7 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  2. 2.A bottle has 3/4 litre of juice. Aarav drinks 7/10 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 1/2 litre of juice. Sara drinks 4/9 litre. How much juice is left (in litres)? =
  4. 4.3/4 − 1/8 =
  5. 5.8/9 − 1/6 =
  6. 6.A tank is 6/7 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  7. 7.1/2 − 1/10 =
  8. 8.A tank is 7/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  9. 9.1/3 − 1/7 =
  10. 10.A bottle has 5/6 litre of juice. Diya drinks 1/8 litre. How much juice is left (in litres)? =
  11. 11.2/3 − 5/8 =
  12. 12.Anaya has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  13. 13.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  14. 14.5/6 − 1/10 =
  15. 15.1/3 − 1/8 =
  16. 16.1/3 − 2/7 =
  17. 17.1/4 − 1/7 =
  18. 18.1/2 − 2/9 =
  19. 19.Kabir has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  20. 20.5/8 − 1/4 =
  21. 21.9/10 − 3/5 =
  22. 22.Meera has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  23. 23.Meera has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  24. 24.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  25. 25.A bottle has 5/9 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  26. 26.A bottle has 2/5 litre of juice. Riya drinks 1/10 litre. How much juice is left (in litres)? =
  27. 27.9/10 − 5/6 =
  28. 28.A tank is 2/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  29. 29.6/7 − 1/3 =
  30. 30.5/6 − 5/8 =
  31. 31.5/7 − 1/4 =
  32. 32.A bottle has 5/7 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.5/7 − 1/2 =
  34. 34.7/8 − 1/4 =
  35. 35.2/9 − 1/6 =
  36. 36.A bottle has 1/3 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  37. 37.5/9 − 1/6 =
  38. 38.5/6 − 2/9 =
  39. 39.A bottle has 5/7 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  40. 40.Tara has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =

Answer key

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

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