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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 341 · 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. 1.4/5 − 1/3 =
  2. 2.7/8 − 1/4 =
  3. 3.2/5 − 3/10 =
  4. 4.7/8 − 3/4 =
  5. 5.A bottle has 1/3 litre of juice. Anaya drinks 2/9 litre. How much juice is left (in litres)? =
  6. 6.Riya has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  7. 7.A bottle has 1/5 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  8. 8.2/3 − 3/7 =
  9. 9.7/10 − 1/5 =
  10. 10.Rohan has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  11. 11.2/3 − 1/6 =
  12. 12.3/4 − 5/8 =
  13. 13.5/6 − 4/5 =
  14. 14.5/6 − 7/9 =
  15. 15.5/9 − 1/6 =
  16. 16.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  17. 17.5/7 − 1/3 =
  18. 18.9/10 − 1/6 =
  19. 19.2/9 − 1/6 =
  20. 20.A bottle has 3/8 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  21. 21.A tank is 7/8 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  22. 22.Rohan has a ribbon 1/2 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  23. 23.4/5 − 1/6 =
  24. 24.Meera has a ribbon 7/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  25. 25.1/2 − 1/9 =
  26. 26.A bottle has 5/6 litre of juice. Ishaan drinks 3/5 litre. How much juice is left (in litres)? =
  27. 27.4/7 − 1/4 =
  28. 28.A bottle has 1/3 litre of juice. Anaya drinks 1/9 litre. How much juice is left (in litres)? =
  29. 29.5/9 − 1/3 =
  30. 30.7/8 − 1/3 =
  31. 31.Rohan has a ribbon 2/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  32. 32.Arjun has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  33. 33.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? =
  34. 34.A bottle has 1/4 litre of juice. Tara drinks 1/7 litre. How much juice is left (in litres)? =
  35. 35.7/10 − 1/2 =
  36. 36.Riya has a ribbon 3/4 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  37. 37.4/7 − 1/2 =
  38. 38.A bottle has 1/6 litre of juice. Anaya drinks 1/8 litre. How much juice is left (in litres)? =
  39. 39.1/2 − 3/8 =
  40. 40.5/6 − 3/5 =

Answer key

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

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