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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 50 · 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 − 4/7 =
  2. 2.1/3 − 1/5 =
  3. 3.Vihaan has a ribbon 7/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  4. 4.3/10 − 1/5 =
  5. 5.A tank is 3/4 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  6. 6.1/2 − 2/7 =
  7. 7.A bottle has 2/3 litre of juice. Meera drinks 5/9 litre. How much juice is left (in litres)? =
  8. 8.5/9 − 1/2 =
  9. 9.A tank is 2/3 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  10. 10.1/3 − 1/9 =
  11. 11.A bottle has 5/7 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  12. 12.3/4 − 5/7 =
  13. 13.A bottle has 4/5 litre of juice. Sara drinks 1/10 litre. How much juice is left (in litres)? =
  14. 14.1/4 − 1/10 =
  15. 15.5/6 − 5/9 =
  16. 16.5/6 − 5/8 =
  17. 17.Riya has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  18. 18.3/4 − 1/8 =
  19. 19.3/4 − 1/10 =
  20. 20.7/8 − 1/3 =
  21. 21.A tank is 5/6 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  22. 22.1/2 − 3/7 =
  23. 23.A bottle has 2/5 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  24. 24.A tank is 1/2 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  25. 25.A tank is 3/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  26. 26.A tank is 8/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  27. 27.2/3 − 1/6 =
  28. 28.9/10 − 1/2 =
  29. 29.7/9 − 1/2 =
  30. 30.Riya has a ribbon 7/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  31. 31.Tara has a ribbon 9/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  32. 32.1/6 − 1/9 =
  33. 33.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? =
  34. 34.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? =
  35. 35.A bottle has 3/4 litre of juice. Kabir drinks 4/7 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 9/10 litre of juice. Anaya drinks 1/5 litre. How much juice is left (in litres)? =
  37. 37.6/7 − 1/3 =
  38. 38.7/9 − 1/3 =
  39. 39.Rohan has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  40. 40.Diya has a ribbon 3/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =

Answer key

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

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