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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 776 · 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 − 1/6 =
  2. 2.5/6 − 2/3 =
  3. 3.2/3 − 3/7 =
  4. 4.4/5 − 1/4 =
  5. 5.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? =
  6. 6.A tank is 2/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  7. 7.A tank is 5/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  8. 8.A bottle has 7/8 litre of juice. Anaya drinks 2/3 litre. How much juice is left (in litres)? =
  9. 9.3/10 − 1/5 =
  10. 10.A bottle has 7/9 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  11. 11.A bottle has 1/4 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  12. 12.A bottle has 4/5 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  13. 13.4/5 − 2/3 =
  14. 14.Tara has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  15. 15.1/2 − 1/9 =
  16. 16.2/9 − 1/6 =
  17. 17.3/4 − 4/7 =
  18. 18.Aarav has a ribbon 9/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  19. 19.A bottle has 2/3 litre of juice. Arjun drinks 1/7 litre. How much juice is left (in litres)? =
  20. 20.1/2 − 3/7 =
  21. 21.3/4 − 3/10 =
  22. 22.A tank is 5/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  23. 23.1/2 − 3/8 =
  24. 24.1/6 − 1/10 =
  25. 25.Anaya has a ribbon 5/6 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  26. 26.3/4 − 2/5 =
  27. 27.1/2 − 4/9 =
  28. 28.Vihaan has a ribbon 2/3 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  29. 29.2/7 − 1/4 =
  30. 30.3/5 − 1/10 =
  31. 31.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? =
  32. 32.5/8 − 1/6 =
  33. 33.A tank is 1/6 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 3/4 litre of juice. Diya drinks 1/5 litre. How much juice is left (in litres)? =
  35. 35.2/3 − 3/8 =
  36. 36.A bottle has 7/10 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  37. 37.Rohan has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 5/6 litre of juice. Diya drinks 1/10 litre. How much juice is left (in litres)? =
  39. 39.7/8 − 1/3 =
  40. 40.A bottle has 1/6 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =

Answer key

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

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