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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 876 · 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. 1.2/3 − 1/6 =
  2. 2.Arjun 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 − 2/3 =
  4. 4.Ishaan has a ribbon 5/6 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  5. 5.1/3 − 2/9 =
  6. 6.Arjun has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  7. 7.9/10 − 1/4 =
  8. 8.A tank is 6/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  9. 9.A bottle has 2/3 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  10. 10.A bottle has 1/2 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =
  11. 11.A tank is 9/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  12. 12.Vihaan has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  13. 13.5/9 − 1/3 =
  14. 14.7/9 − 1/3 =
  15. 15.1/4 − 1/10 =
  16. 16.Meera has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 5/6 litre of juice. Kabir drinks 2/9 litre. How much juice is left (in litres)? =
  18. 18.1/2 − 3/8 =
  19. 19.A tank is 3/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  20. 20.4/5 − 1/10 =
  21. 21.A tank is 7/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  22. 22.5/6 − 4/9 =
  23. 23.6/7 − 1/2 =
  24. 24.5/7 − 1/3 =
  25. 25.A bottle has 1/3 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  26. 26.A bottle has 1/6 litre of juice. Vihaan drinks 1/8 litre. How much juice is left (in litres)? =
  27. 27.6/7 − 1/4 =
  28. 28.A bottle has 3/4 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  29. 29.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? =
  30. 30.3/8 − 1/3 =
  31. 31.3/7 − 1/4 =
  32. 32.3/7 − 1/3 =
  33. 33.A bottle has 4/9 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  34. 34.9/10 − 2/5 =
  35. 35.5/6 − 1/8 =
  36. 36.1/3 − 1/8 =
  37. 37.A tank is 5/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  38. 38.5/9 − 1/2 =
  39. 39.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  40. 40.3/4 − 1/3 =

Answer key

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

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