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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 26 · 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. 1.3/5 − 1/4 =
  2. 2.2/5 − 1/3 =
  3. 3.4/5 − 7/10 =
  4. 4.1/3 − 1/9 =
  5. 5.3/5 − 1/6 =
  6. 6.5/9 − 1/3 =
  7. 7.8/9 − 5/6 =
  8. 8.6/7 − 3/4 =
  9. 9.Riya has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  10. 10.A tank is 5/6 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  11. 11.9/10 − 1/4 =
  12. 12.A bottle has 2/3 litre of juice. Riya drinks 1/7 litre. How much juice is left (in litres)? =
  13. 13.3/4 − 5/7 =
  14. 14.4/5 − 1/2 =
  15. 15.5/7 − 2/3 =
  16. 16.A bottle has 3/8 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  17. 17.A bottle has 1/2 litre of juice. Rohan drinks 2/7 litre. How much juice is left (in litres)? =
  18. 18.Diya has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  19. 19.1/6 − 1/9 =
  20. 20.A bottle has 9/10 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  21. 21.5/6 − 5/9 =
  22. 22.1/2 − 1/8 =
  23. 23.A tank is 5/6 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  24. 24.3/4 − 3/8 =
  25. 25.5/6 − 3/8 =
  26. 26.5/6 − 5/8 =
  27. 27.A bottle has 2/5 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  28. 28.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  29. 29.1/2 − 2/5 =
  30. 30.2/9 − 1/6 =
  31. 31.A tank is 1/2 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  32. 32.A bottle has 2/3 litre of juice. Tara drinks 3/10 litre. How much juice is left (in litres)? =
  33. 33.1/2 − 1/5 =
  34. 34.6/7 − 1/4 =
  35. 35.5/6 − 2/5 =
  36. 36.A tank is 4/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  37. 37.4/9 − 1/6 =
  38. 38.5/6 − 1/5 =
  39. 39.8/9 − 2/3 =
  40. 40.A tank is 2/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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