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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 214 · 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 1/2 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  2. 2.Kabir has a ribbon 5/6 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  3. 3.Kabir has a ribbon 3/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  4. 4.1/6 − 1/8 =
  5. 5.5/8 − 1/6 =
  6. 6.3/4 − 5/8 =
  7. 7.A bottle has 2/3 litre of juice. Riya drinks 2/7 litre. How much juice is left (in litres)? =
  8. 8.A tank is 5/6 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  9. 9.3/4 − 1/5 =
  10. 10.A tank is 1/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  11. 11.A tank is 5/6 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  12. 12.Ishaan has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  13. 13.2/3 − 3/7 =
  14. 14.2/3 − 3/8 =
  15. 15.3/8 − 1/4 =
  16. 16.1/2 − 2/7 =
  17. 17.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  18. 18.7/8 − 3/4 =
  19. 19.A bottle has 2/3 litre of juice. Meera drinks 5/8 litre. How much juice is left (in litres)? =
  20. 20.A bottle has 5/7 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  21. 21.1/4 − 1/8 =
  22. 22.9/10 − 3/4 =
  23. 23.Ishaan has a ribbon 5/6 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  24. 24.Anaya has a ribbon 1/2 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  25. 25.9/10 − 1/2 =
  26. 26.8/9 − 5/6 =
  27. 27.9/10 − 3/5 =
  28. 28.4/5 − 3/4 =
  29. 29.A bottle has 9/10 litre of juice. Anaya drinks 5/6 litre. How much juice is left (in litres)? =
  30. 30.A bottle has 6/7 litre of juice. Vihaan drinks 3/4 litre. How much juice is left (in litres)? =
  31. 31.4/5 − 1/4 =
  32. 32.7/8 − 1/3 =
  33. 33.A tank is 2/3 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  34. 34.7/9 − 2/3 =
  35. 35.A bottle has 2/3 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  36. 36.4/5 − 7/10 =
  37. 37.1/2 − 2/9 =
  38. 38.A bottle has 3/5 litre of juice. Arjun drinks 1/10 litre. How much juice is left (in litres)? =
  39. 39.6/7 − 2/3 =
  40. 40.A bottle has 1/2 litre of juice. Tara drinks 1/7 litre. How much juice is left (in litres)? =

Answer key

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

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