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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 146 · 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 9/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  2. 2.2/3 − 3/8 =
  3. 3.Riya has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  4. 4.A bottle has 1/2 litre of juice. Diya drinks 2/9 litre. How much juice is left (in litres)? =
  5. 5.2/3 − 1/2 =
  6. 6.7/9 − 1/6 =
  7. 7.9/10 − 4/5 =
  8. 8.A bottle has 4/5 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  9. 9.8/9 − 1/6 =
  10. 10.2/3 − 4/9 =
  11. 11.A bottle has 1/2 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  12. 12.3/4 − 3/8 =
  13. 13.3/4 − 1/5 =
  14. 14.6/7 − 2/3 =
  15. 15.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? =
  16. 16.Arjun has a ribbon 1/3 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  17. 17.1/6 − 1/8 =
  18. 18.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  19. 19.3/10 − 1/5 =
  20. 20.1/3 − 3/10 =
  21. 21.Rohan has a ribbon 9/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  22. 22.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? =
  23. 23.A tank is 9/10 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  24. 24.7/9 − 1/2 =
  25. 25.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? =
  26. 26.Riya has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  27. 27.3/8 − 1/3 =
  28. 28.A bottle has 3/5 litre of juice. Tara drinks 3/10 litre. How much juice is left (in litres)? =
  29. 29.5/8 − 1/3 =
  30. 30.Arjun has a ribbon 5/6 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  31. 31.1/4 − 1/10 =
  32. 32.Kabir has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  33. 33.A bottle has 4/5 litre of juice. Vihaan drinks 7/10 litre. How much juice is left (in litres)? =
  34. 34.5/6 − 5/8 =
  35. 35.3/4 − 1/7 =
  36. 36.A bottle has 5/6 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  37. 37.7/8 − 1/3 =
  38. 38.A bottle has 2/3 litre of juice. Diya drinks 5/8 litre. How much juice is left (in litres)? =
  39. 39.Anaya has a ribbon 3/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  40. 40.3/7 − 1/4 =

Answer key

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

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