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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 970 · 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. 1.3/4 − 3/8 =
  2. 2.2/3 − 5/9 =
  3. 3.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? =
  4. 4.A bottle has 4/5 litre of juice. Anaya drinks 7/10 litre. How much juice is left (in litres)? =
  5. 5.Sara has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  6. 6.9/10 − 2/5 =
  7. 7.Rohan has a ribbon 5/6 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  8. 8.Ishaan has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  9. 9.2/3 − 1/4 =
  10. 10.5/6 − 1/8 =
  11. 11.A bottle has 8/9 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  12. 12.3/4 − 3/7 =
  13. 13.A bottle has 2/3 litre of juice. Diya drinks 2/7 litre. How much juice is left (in litres)? =
  14. 14.8/9 − 5/6 =
  15. 15.6/7 − 1/3 =
  16. 16.1/2 − 3/8 =
  17. 17.2/3 − 5/8 =
  18. 18.A bottle has 1/3 litre of juice. Sara drinks 1/9 litre. How much juice is left (in litres)? =
  19. 19.1/2 − 1/9 =
  20. 20.3/5 − 1/3 =
  21. 21.Aarav has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  22. 22.Aarav has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  23. 23.3/8 − 1/6 =
  24. 24.5/6 − 2/3 =
  25. 25.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? =
  26. 26.A bottle has 5/6 litre of juice. Aarav drinks 3/10 litre. How much juice is left (in litres)? =
  27. 27.A tank is 3/4 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  28. 28.A bottle has 5/6 litre of juice. Diya drinks 1/8 litre. How much juice is left (in litres)? =
  29. 29.5/9 − 1/3 =
  30. 30.1/3 − 1/9 =
  31. 31.7/9 − 1/2 =
  32. 32.5/7 − 1/4 =
  33. 33.A tank is 5/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  34. 34.A tank is 1/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  35. 35.Ishaan has a ribbon 2/3 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  36. 36.3/4 − 5/7 =
  37. 37.3/7 − 1/3 =
  38. 38.A tank is 3/4 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  39. 39.A bottle has 5/6 litre of juice. Aarav drinks 4/5 litre. How much juice is left (in litres)? =
  40. 40.5/6 − 4/9 =

Answer key

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

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