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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 91 · 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. 1.4/9 − 1/6 =
  2. 2.Meera has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  3. 3.4/9 − 1/3 =
  4. 4.5/6 − 3/5 =
  5. 5.5/8 − 1/4 =
  6. 6.A bottle has 7/10 litre of juice. Vihaan drinks 1/5 litre. How much juice is left (in litres)? =
  7. 7.Riya has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  8. 8.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? =
  9. 9.A tank is 8/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  10. 10.3/4 − 1/5 =
  11. 11.Sara has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  12. 12.A bottle has 4/5 litre of juice. Vihaan drinks 1/10 litre. How much juice is left (in litres)? =
  13. 13.7/9 − 1/3 =
  14. 14.8/9 − 1/2 =
  15. 15.1/5 − 1/6 =
  16. 16.3/4 − 1/6 =
  17. 17.A bottle has 1/2 litre of juice. Arjun drinks 3/10 litre. How much juice is left (in litres)? =
  18. 18.5/6 − 1/5 =
  19. 19.Meera has a ribbon 8/9 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  20. 20.7/10 − 1/2 =
  21. 21.A tank is 2/3 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  22. 22.7/10 − 1/6 =
  23. 23.A bottle has 2/7 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  24. 24.A bottle has 1/4 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  25. 25.A tank is 5/6 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  26. 26.5/6 − 1/8 =
  27. 27.2/5 − 1/3 =
  28. 28.9/10 − 1/3 =
  29. 29.Aarav has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  30. 30.3/4 − 2/5 =
  31. 31.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? =
  32. 32.3/5 − 1/2 =
  33. 33.1/3 − 1/5 =
  34. 34.A bottle has 4/5 litre of juice. Ishaan drinks 7/10 litre. How much juice is left (in litres)? =
  35. 35.1/2 − 2/9 =
  36. 36.A tank is 3/4 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  37. 37.Riya has a ribbon 3/4 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  38. 38.Diya has a ribbon 9/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  39. 39.5/9 − 1/6 =
  40. 40.Anaya has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =

Answer key

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

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