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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 769 · 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. 1.8/9 − 1/3 =
  2. 2.2/3 − 3/7 =
  3. 3.9/10 − 2/3 =
  4. 4.5/6 − 1/3 =
  5. 5.4/7 − 1/2 =
  6. 6.Kabir has a ribbon 3/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  7. 7.Aarav has a ribbon 5/6 m long and cuts off 7/9 m. How long is the ribbon now (in m)? =
  8. 8.6/7 − 3/4 =
  9. 9.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  10. 10.7/8 − 5/6 =
  11. 11.Vihaan has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  12. 12.5/6 − 5/9 =
  13. 13.1/2 − 2/9 =
  14. 14.A bottle has 3/7 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  15. 15.3/7 − 1/3 =
  16. 16.5/9 − 1/6 =
  17. 17.A bottle has 8/9 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.Sara has a ribbon 8/9 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  19. 19.5/6 − 3/4 =
  20. 20.1/2 − 1/7 =
  21. 21.A tank is 9/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  22. 22.Aarav has a ribbon 2/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  23. 23.A tank is 3/4 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  24. 24.2/5 − 1/6 =
  25. 25.Riya has a ribbon 9/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  26. 26.Meera has a ribbon 3/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  27. 27.4/7 − 1/4 =
  28. 28.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  29. 29.Meera has a ribbon 1/3 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  30. 30.5/8 − 1/3 =
  31. 31.1/3 − 1/7 =
  32. 32.A bottle has 2/3 litre of juice. Ishaan drinks 1/7 litre. How much juice is left (in litres)? =
  33. 33.2/7 − 1/4 =
  34. 34.2/5 − 1/4 =
  35. 35.7/8 − 2/3 =
  36. 36.1/2 − 1/3 =
  37. 37.Diya has a ribbon 1/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  38. 38.4/5 − 3/10 =
  39. 39.Ishaan has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  40. 40.2/3 − 1/7 =

Answer key

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

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