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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 302 · 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. 1.1/3 − 1/7 =
  2. 2.1/6 − 1/10 =
  3. 3.6/7 − 1/2 =
  4. 4.3/5 − 1/10 =
  5. 5.Tara has a ribbon 7/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  6. 6.A tank is 7/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  7. 7.Arjun has a ribbon 3/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  8. 8.A bottle has 2/3 litre of juice. Sara drinks 5/9 litre. How much juice is left (in litres)? =
  9. 9.Kabir has a ribbon 4/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  10. 10.2/5 − 1/10 =
  11. 11.2/3 − 2/7 =
  12. 12.Vihaan has a ribbon 2/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  13. 13.Sara has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  14. 14.7/10 − 1/2 =
  15. 15.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? =
  16. 16.A bottle has 7/9 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  17. 17.1/4 − 1/5 =
  18. 18.A bottle has 2/9 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  19. 19.A bottle has 4/5 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  20. 20.A bottle has 1/3 litre of juice. Riya drinks 1/7 litre. How much juice is left (in litres)? =
  21. 21.Riya has a ribbon 3/4 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  22. 22.9/10 − 4/5 =
  23. 23.5/6 − 7/9 =
  24. 24.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? =
  25. 25.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  26. 26.4/5 − 2/3 =
  27. 27.Kabir has a ribbon 1/3 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  28. 28.2/3 − 1/4 =
  29. 29.5/7 − 1/2 =
  30. 30.A bottle has 3/4 litre of juice. Anaya drinks 5/7 litre. How much juice is left (in litres)? =
  31. 31.A bottle has 9/10 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  32. 32.7/8 − 1/6 =
  33. 33.3/4 − 5/7 =
  34. 34.Ishaan has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  35. 35.2/3 − 5/9 =
  36. 36.Tara has a ribbon 1/2 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  37. 37.9/10 − 1/3 =
  38. 38.9/10 − 3/4 =
  39. 39.9/10 − 5/6 =
  40. 40.Meera has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =

Answer key

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

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