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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 551 · 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.Vihaan has a ribbon 3/4 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  2. 2.5/6 − 1/9 =
  3. 3.9/10 − 1/6 =
  4. 4.1/2 − 3/8 =
  5. 5.1/6 − 1/9 =
  6. 6.9/10 − 1/5 =
  7. 7.A bottle has 6/7 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  8. 8.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? =
  9. 9.7/9 − 1/3 =
  10. 10.3/4 − 3/7 =
  11. 11.A tank is 2/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  12. 12.Meera has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  13. 13.5/7 − 1/3 =
  14. 14.9/10 − 3/4 =
  15. 15.A tank is 1/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  16. 16.5/8 − 1/3 =
  17. 17.1/4 − 1/8 =
  18. 18.Ishaan has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  19. 19.3/4 − 2/5 =
  20. 20.7/8 − 2/3 =
  21. 21.5/6 − 3/10 =
  22. 22.2/3 − 5/9 =
  23. 23.A tank is 5/6 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  24. 24.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  25. 25.1/3 − 3/10 =
  26. 26.3/4 − 4/7 =
  27. 27.A tank is 2/3 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  28. 28.7/10 − 1/6 =
  29. 29.Arjun has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  30. 30.5/9 − 1/6 =
  31. 31.A bottle has 1/2 litre of juice. Anaya drinks 2/5 litre. How much juice is left (in litres)? =
  32. 32.6/7 − 1/4 =
  33. 33.7/9 − 1/6 =
  34. 34.A bottle has 1/2 litre of juice. Sara drinks 3/7 litre. How much juice is left (in litres)? =
  35. 35.A tank is 1/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  36. 36.Ishaan has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  37. 37.5/6 − 2/5 =
  38. 38.7/9 − 1/2 =
  39. 39.6/7 − 1/2 =
  40. 40.A tank is 5/6 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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