← Subtracting fractions: different denominators lesson New set →

Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 991 · 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. 1.7/9 − 1/3 =
  2. 2.9/10 − 2/5 =
  3. 3.2/5 − 1/4 =
  4. 4.2/3 − 1/7 =
  5. 5.1/2 − 1/9 =
  6. 6.2/9 − 1/6 =
  7. 7.A bottle has 2/3 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  8. 8.2/5 − 3/10 =
  9. 9.2/3 − 1/9 =
  10. 10.Vihaan has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  11. 11.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? =
  12. 12.5/6 − 5/9 =
  13. 13.4/5 − 1/4 =
  14. 14.5/6 − 4/5 =
  15. 15.A tank is 3/4 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  16. 16.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  17. 17.Rohan has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  18. 18.4/7 − 1/2 =
  19. 19.7/10 − 2/5 =
  20. 20.A tank is 4/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  21. 21.2/3 − 2/7 =
  22. 22.A bottle has 1/2 litre of juice. Kabir drinks 4/9 litre. How much juice is left (in litres)? =
  23. 23.Aarav has a ribbon 3/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  24. 24.Tara has a ribbon 2/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  25. 25.Sara has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  26. 26.A tank is 1/2 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  27. 27.A bottle has 3/4 litre of juice. Kabir drinks 1/7 litre. How much juice is left (in litres)? =
  28. 28.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? =
  29. 29.A tank is 3/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  30. 30.5/6 − 1/4 =
  31. 31.7/9 − 2/3 =
  32. 32.2/3 − 1/5 =
  33. 33.A bottle has 4/9 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  34. 34.1/2 − 1/3 =
  35. 35.A bottle has 2/3 litre of juice. Rohan drinks 1/2 litre. How much juice is left (in litres)? =
  36. 36.4/9 − 1/3 =
  37. 37.2/3 − 4/9 =
  38. 38.1/4 − 1/6 =
  39. 39.3/4 − 4/7 =
  40. 40.1/3 − 1/8 =

Answer key

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

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