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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 262 · 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. 2.2/3 − 1/7 =
  3. 3.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? =
  4. 4.Arjun has a ribbon 2/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  5. 5.2/3 − 1/10 =
  6. 6.6/7 − 2/3 =
  7. 7.2/3 − 4/9 =
  8. 8.9/10 − 1/4 =
  9. 9.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? =
  10. 10.A tank is 7/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  11. 11.5/9 − 1/2 =
  12. 12.4/7 − 1/2 =
  13. 13.4/9 − 1/3 =
  14. 14.3/4 − 1/8 =
  15. 15.Tara has a ribbon 2/3 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  16. 16.2/3 − 3/7 =
  17. 17.Arjun has a ribbon 1/2 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  18. 18.A bottle has 5/6 litre of juice. Kabir drinks 1/10 litre. How much juice is left (in litres)? =
  19. 19.Vihaan has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  20. 20.5/6 − 1/8 =
  21. 21.Arjun has a ribbon 5/6 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 1/4 litre of juice. Diya drinks 1/8 litre. How much juice is left (in litres)? =
  23. 23.1/5 − 1/10 =
  24. 24.9/10 − 1/3 =
  25. 25.A tank is 1/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  26. 26.A bottle has 2/3 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =
  27. 27.8/9 − 1/2 =
  28. 28.A tank is 5/6 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  29. 29.Sara has a ribbon 4/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  30. 30.A bottle has 8/9 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  31. 31.Meera has a ribbon 3/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  32. 32.1/2 − 1/7 =
  33. 33.Meera has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  34. 34.4/5 − 3/4 =
  35. 35.A bottle has 1/4 litre of juice. Sara drinks 1/7 litre. How much juice is left (in litres)? =
  36. 36.A tank is 9/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  37. 37.A bottle has 2/3 litre of juice. Aarav drinks 4/7 litre. How much juice is left (in litres)? =
  38. 38.3/10 − 1/4 =
  39. 39.5/8 − 1/4 =
  40. 40.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? =

Answer key

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

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