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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 401 · 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 3/5 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  2. 2.Kabir has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  3. 3.8/9 − 5/6 =
  4. 4.1/2 − 1/3 =
  5. 5.3/8 − 1/6 =
  6. 6.2/3 − 4/9 =
  7. 7.2/7 − 1/4 =
  8. 8.5/8 − 1/4 =
  9. 9.Vihaan has a ribbon 3/4 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  10. 10.Sara has a ribbon 3/4 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  11. 11.4/5 − 7/10 =
  12. 12.3/4 − 3/10 =
  13. 13.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? =
  14. 14.1/2 − 2/7 =
  15. 15.A bottle has 3/4 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  16. 16.3/7 − 1/4 =
  17. 17.A bottle has 9/10 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  18. 18.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? =
  19. 19.Anaya has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  20. 20.1/6 − 1/10 =
  21. 21.6/7 − 2/3 =
  22. 22.7/9 − 1/3 =
  23. 23.A tank is 3/4 full of water. Then water filling 5/7 of the tank is used. What fraction of the tank is full now? =
  24. 24.A bottle has 2/3 litre of juice. Kabir drinks 2/5 litre. How much juice is left (in litres)? =
  25. 25.1/2 − 3/7 =
  26. 26.A bottle has 2/3 litre of juice. Arjun drinks 3/5 litre. How much juice is left (in litres)? =
  27. 27.Vihaan has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  28. 28.3/5 − 1/2 =
  29. 29.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? =
  30. 30.A bottle has 7/10 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  31. 31.7/8 − 5/6 =
  32. 32.1/2 − 4/9 =
  33. 33.5/6 − 1/9 =
  34. 34.5/8 − 1/3 =
  35. 35.3/4 − 2/7 =
  36. 36.A tank is 3/4 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  37. 37.4/5 − 1/4 =
  38. 38.A bottle has 5/8 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  39. 39.7/8 − 1/2 =
  40. 40.5/6 − 3/8 =

Answer key

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

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