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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 123 · 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 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  2. 2.4/5 − 1/6 =
  3. 3.5/7 − 1/4 =
  4. 4.Ishaan has a ribbon 3/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  5. 5.2/3 − 2/9 =
  6. 6.A bottle has 5/6 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  7. 7.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? =
  8. 8.9/10 − 3/5 =
  9. 9.5/7 − 1/2 =
  10. 10.5/7 − 2/3 =
  11. 11.3/8 − 1/3 =
  12. 12.9/10 − 5/6 =
  13. 13.A tank is 7/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  14. 14.A bottle has 5/9 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  15. 15.A tank is 5/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  16. 16.2/5 − 1/3 =
  17. 17.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? =
  18. 18.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  19. 19.3/4 − 2/5 =
  20. 20.1/3 − 1/8 =
  21. 21.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  22. 22.Aarav has a ribbon 5/6 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  23. 23.3/10 − 1/6 =
  24. 24.7/9 − 1/2 =
  25. 25.Diya has a ribbon 2/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  26. 26.Tara has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  27. 27.1/2 − 2/5 =
  28. 28.3/4 − 1/5 =
  29. 29.1/3 − 1/9 =
  30. 30.A bottle has 5/8 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  31. 31.8/9 − 1/3 =
  32. 32.A bottle has 3/4 litre of juice. Ishaan drinks 1/7 litre. How much juice is left (in litres)? =
  33. 33.A tank is 2/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  34. 34.A bottle has 7/9 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  35. 35.2/3 − 5/9 =
  36. 36.7/8 − 3/4 =
  37. 37.A bottle has 5/6 litre of juice. Sara drinks 3/8 litre. How much juice is left (in litres)? =
  38. 38.4/7 − 1/4 =
  39. 39.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  40. 40.Ishaan has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =

Answer key

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

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