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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 217 · 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.Ishaan has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  2. 2.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  3. 3.A bottle has 8/9 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  4. 4.Vihaan has a ribbon 7/10 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  5. 5.A bottle has 1/2 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =
  6. 6.5/7 − 2/3 =
  7. 7.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? =
  8. 8.7/9 − 1/6 =
  9. 9.3/5 − 1/6 =
  10. 10.A bottle has 1/3 litre of juice. Riya drinks 3/10 litre. How much juice is left (in litres)? =
  11. 11.3/4 − 3/5 =
  12. 12.Meera has a ribbon 3/4 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  13. 13.A tank is 2/3 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  14. 14.A bottle has 3/8 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  15. 15.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? =
  16. 16.Tara has a ribbon 7/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  17. 17.4/5 − 1/3 =
  18. 18.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  19. 19.A tank is 1/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  20. 20.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? =
  21. 21.A bottle has 7/10 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  22. 22.5/7 − 1/4 =
  23. 23.5/6 − 2/9 =
  24. 24.9/10 − 4/5 =
  25. 25.4/9 − 1/3 =
  26. 26.3/4 − 1/10 =
  27. 27.3/10 − 1/5 =
  28. 28.1/2 − 1/5 =
  29. 29.7/10 − 3/5 =
  30. 30.3/4 − 2/7 =
  31. 31.9/10 − 1/5 =
  32. 32.3/5 − 1/2 =
  33. 33.A tank is 1/2 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  34. 34.A bottle has 4/5 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  35. 35.5/7 − 1/2 =
  36. 36.A tank is 5/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  37. 37.3/4 − 1/7 =
  38. 38.7/9 − 2/3 =
  39. 39.Kabir has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  40. 40.A bottle has 7/8 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =

Answer key

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

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