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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 138 · 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 − 2/7 =
  2. 2.5/6 − 3/4 =
  3. 3.A tank is 3/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  4. 4.9/10 − 1/5 =
  5. 5.A bottle has 1/6 litre of juice. Diya drinks 1/9 litre. How much juice is left (in litres)? =
  6. 6.2/3 − 2/5 =
  7. 7.A bottle has 2/5 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  8. 8.3/4 − 5/8 =
  9. 9.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? =
  10. 10.A tank is 1/2 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  11. 11.8/9 − 1/3 =
  12. 12.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  13. 13.Sara has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  14. 14.A tank is 9/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  15. 15.5/6 − 1/2 =
  16. 16.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  17. 17.A tank is 4/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  18. 18.A tank is 5/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  19. 19.A bottle has 5/9 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  20. 20.3/4 − 2/5 =
  21. 21.3/7 − 1/3 =
  22. 22.1/2 − 1/4 =
  23. 23.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  24. 24.8/9 − 2/3 =
  25. 25.A tank is 7/8 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  26. 26.3/4 − 5/7 =
  27. 27.5/6 − 1/5 =
  28. 28.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? =
  29. 29.1/3 − 2/7 =
  30. 30.2/5 − 1/6 =
  31. 31.A tank is 4/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  32. 32.7/8 − 1/2 =
  33. 33.3/4 − 3/7 =
  34. 34.A bottle has 1/4 litre of juice. Tara drinks 1/10 litre. How much juice is left (in litres)? =
  35. 35.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  36. 36.1/2 − 1/9 =
  37. 37.A tank is 4/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 7/8 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  39. 39.5/6 − 4/9 =
  40. 40.8/9 − 1/6 =

Answer key

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

Free fractions lessons, practice and worksheets at talentjr.in/fractions-for-kids