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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 644 · 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.A tank is 4/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  2. 2.7/8 − 1/2 =
  3. 3.8/9 − 5/6 =
  4. 4.Kabir has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  5. 5.Kabir has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  6. 6.4/7 − 1/4 =
  7. 7.3/4 − 1/10 =
  8. 8.3/5 − 1/4 =
  9. 9.9/10 − 3/5 =
  10. 10.Aarav has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  11. 11.A tank is 9/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  12. 12.2/3 − 3/5 =
  13. 13.A bottle has 5/6 litre of juice. Diya drinks 1/8 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 9/10 litre of juice. Diya drinks 3/4 litre. How much juice is left (in litres)? =
  15. 15.3/4 − 3/8 =
  16. 16.6/7 − 3/4 =
  17. 17.A bottle has 3/4 litre of juice. Aarav drinks 3/7 litre. How much juice is left (in litres)? =
  18. 18.9/10 − 3/4 =
  19. 19.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  20. 20.A tank is 3/4 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  21. 21.Riya has a ribbon 1/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 2/3 litre of juice. Vihaan drinks 1/5 litre. How much juice is left (in litres)? =
  23. 23.A tank is 1/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  24. 24.Arjun has a ribbon 3/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  25. 25.A tank is 2/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  26. 26.A tank is 5/6 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  27. 27.Tara has a ribbon 9/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  28. 28.3/4 − 5/8 =
  29. 29.A bottle has 7/9 litre of juice. Tara drinks 2/3 litre. How much juice is left (in litres)? =
  30. 30.A tank is 1/2 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  31. 31.Anaya has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  32. 32.1/4 − 1/8 =
  33. 33.A bottle has 2/3 litre of juice. Diya drinks 1/9 litre. How much juice is left (in litres)? =
  34. 34.Tara has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  35. 35.3/5 − 1/2 =
  36. 36.6/7 − 1/3 =
  37. 37.1/6 − 1/9 =
  38. 38.Meera has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 1/4 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  40. 40.5/6 − 5/9 =

Answer key

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

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