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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 541 · 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 5/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  2. 2.Vihaan has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  3. 3.6/7 − 3/4 =
  4. 4.2/5 − 1/4 =
  5. 5.3/8 − 1/3 =
  6. 6.4/5 − 1/2 =
  7. 7.Aarav has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  8. 8.A bottle has 2/3 litre of juice. Tara drinks 1/7 litre. How much juice is left (in litres)? =
  9. 9.3/5 − 1/6 =
  10. 10.3/10 − 1/6 =
  11. 11.A bottle has 7/8 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  12. 12.5/8 − 1/2 =
  13. 13.7/8 − 1/2 =
  14. 14.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? =
  15. 15.A bottle has 7/10 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  16. 16.5/7 − 1/3 =
  17. 17.1/2 − 1/7 =
  18. 18.5/6 − 1/5 =
  19. 19.A bottle has 5/6 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  20. 20.7/10 − 1/4 =
  21. 21.A bottle has 4/7 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  22. 22.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  23. 23.Kabir has a ribbon 1/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  24. 24.9/10 − 5/6 =
  25. 25.A tank is 3/4 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  26. 26.A bottle has 5/6 litre of juice. Anaya drinks 1/5 litre. How much juice is left (in litres)? =
  27. 27.8/9 − 2/3 =
  28. 28.Rohan has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  29. 29.4/5 − 1/10 =
  30. 30.A bottle has 1/5 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  31. 31.Arjun has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  32. 32.Anaya has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  33. 33.3/10 − 1/5 =
  34. 34.5/8 − 1/6 =
  35. 35.3/5 − 1/10 =
  36. 36.Riya has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  37. 37.Kabir has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  38. 38.3/8 − 1/4 =
  39. 39.2/3 − 2/9 =
  40. 40.5/8 − 1/3 =

Answer key

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

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