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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 545 · 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. 1.4/9 − 1/3 =
  2. 2.1/2 − 1/4 =
  3. 3.5/6 − 3/10 =
  4. 4.1/2 − 2/7 =
  5. 5.1/2 − 1/5 =
  6. 6.3/4 − 3/5 =
  7. 7.9/10 − 1/3 =
  8. 8.3/8 − 1/3 =
  9. 9.2/5 − 1/10 =
  10. 10.A bottle has 9/10 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  11. 11.A bottle has 1/2 litre of juice. Ishaan drinks 4/9 litre. How much juice is left (in litres)? =
  12. 12.2/5 − 1/3 =
  13. 13.5/6 − 4/9 =
  14. 14.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? =
  15. 15.3/4 − 1/5 =
  16. 16.6/7 − 3/4 =
  17. 17.3/5 − 1/4 =
  18. 18.4/7 − 1/2 =
  19. 19.A tank is 1/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  20. 20.A bottle has 5/6 litre of juice. Anaya drinks 7/10 litre. How much juice is left (in litres)? =
  21. 21.Rohan has a ribbon 4/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 4/5 litre of juice. Anaya drinks 2/3 litre. How much juice is left (in litres)? =
  23. 23.A tank is 5/6 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  24. 24.A tank is 5/6 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  25. 25.A tank is 1/2 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  26. 26.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  27. 27.7/9 − 1/2 =
  28. 28.5/6 − 3/4 =
  29. 29.6/7 − 1/2 =
  30. 30.3/5 − 1/6 =
  31. 31.1/3 − 1/7 =
  32. 32.2/3 − 1/8 =
  33. 33.1/6 − 1/8 =
  34. 34.3/10 − 1/5 =
  35. 35.A tank is 3/4 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  36. 36.Anaya has a ribbon 7/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  37. 37.7/8 − 1/2 =
  38. 38.2/7 − 1/4 =
  39. 39.1/6 − 1/9 =
  40. 40.1/3 − 1/9 =

Answer key

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

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