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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 385 · 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 − 1/10 =
  2. 2.5/6 − 1/5 =
  3. 3.Ishaan has a ribbon 5/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  4. 4.Meera has a ribbon 1/2 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  5. 5.Meera has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  6. 6.9/10 − 1/6 =
  7. 7.1/3 − 1/4 =
  8. 8.A tank is 4/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  9. 9.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  10. 10.6/7 − 1/3 =
  11. 11.Riya has a ribbon 9/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  12. 12.1/2 − 1/8 =
  13. 13.8/9 − 1/2 =
  14. 14.A bottle has 8/9 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  15. 15.A tank is 6/7 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  16. 16.3/8 − 1/4 =
  17. 17.A tank is 2/3 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  18. 18.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  19. 19.3/5 − 1/10 =
  20. 20.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? =
  21. 21.4/7 − 1/3 =
  22. 22.A bottle has 3/5 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  23. 23.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? =
  24. 24.A tank is 3/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  25. 25.6/7 − 2/3 =
  26. 26.8/9 − 1/6 =
  27. 27.7/8 − 2/3 =
  28. 28.5/7 − 1/3 =
  29. 29.A tank is 3/4 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  30. 30.A tank is 7/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  31. 31.1/2 − 4/9 =
  32. 32.Kabir has a ribbon 2/3 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  33. 33.3/10 − 1/5 =
  34. 34.Rohan has a ribbon 4/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  35. 35.Aarav has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  36. 36.A tank is 9/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  37. 37.2/3 − 1/7 =
  38. 38.4/7 − 1/2 =
  39. 39.A bottle has 5/7 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  40. 40.7/8 − 5/6 =

Answer key

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

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