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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 559 · 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. 1.1/2 − 1/5 =
  2. 2.7/9 − 1/3 =
  3. 3.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  4. 4.5/7 − 1/4 =
  5. 5.Anaya has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  6. 6.A tank is 3/4 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  7. 7.3/4 − 1/7 =
  8. 8.8/9 − 1/3 =
  9. 9.1/4 − 1/7 =
  10. 10.A bottle has 1/2 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  11. 11.9/10 − 1/3 =
  12. 12.Ishaan has a ribbon 5/6 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  13. 13.Sara has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  14. 14.A tank is 1/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  15. 15.6/7 − 1/2 =
  16. 16.7/8 − 2/3 =
  17. 17.A bottle has 5/6 litre of juice. Kabir drinks 4/5 litre. How much juice is left (in litres)? =
  18. 18.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? =
  19. 19.A bottle has 1/6 litre of juice. Arjun drinks 1/10 litre. How much juice is left (in litres)? =
  20. 20.5/6 − 1/8 =
  21. 21.3/4 − 7/10 =
  22. 22.5/6 − 2/3 =
  23. 23.3/4 − 3/5 =
  24. 24.Ishaan has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  25. 25.1/3 − 1/9 =
  26. 26.2/3 − 1/2 =
  27. 27.A tank is 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  28. 28.A bottle has 8/9 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  29. 29.3/5 − 1/6 =
  30. 30.3/4 − 1/10 =
  31. 31.A bottle has 5/8 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 1/2 litre of juice. Sara drinks 1/7 litre. How much juice is left (in litres)? =
  33. 33.8/9 − 1/6 =
  34. 34.1/3 − 3/10 =
  35. 35.A tank is 5/6 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  36. 36.2/3 − 4/7 =
  37. 37.Anaya has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  38. 38.8/9 − 1/2 =
  39. 39.3/5 − 1/3 =
  40. 40.9/10 − 3/5 =

Answer key

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

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