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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 271 · 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 bottle has 7/8 litre of juice. Rohan drinks 5/6 litre. How much juice is left (in litres)? =
  2. 2.6/7 − 1/2 =
  3. 3.A bottle has 7/8 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 9/10 litre of juice. Kabir drinks 3/5 litre. How much juice is left (in litres)? =
  5. 5.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  6. 6.A tank is 3/4 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  7. 7.7/10 − 2/3 =
  8. 8.Rohan has a ribbon 5/6 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  9. 9.1/2 − 2/7 =
  10. 10.5/6 − 1/5 =
  11. 11.Tara has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  12. 12.A bottle has 9/10 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  13. 13.3/8 − 1/3 =
  14. 14.1/3 − 1/5 =
  15. 15.1/3 − 2/7 =
  16. 16.A bottle has 5/6 litre of juice. Ishaan drinks 2/5 litre. How much juice is left (in litres)? =
  17. 17.1/3 − 1/8 =
  18. 18.5/7 − 2/3 =
  19. 19.3/5 − 1/3 =
  20. 20.Aarav has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  21. 21.Anaya has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  22. 22.5/6 − 5/9 =
  23. 23.7/9 − 1/3 =
  24. 24.3/4 − 2/7 =
  25. 25.5/6 − 3/4 =
  26. 26.8/9 − 5/6 =
  27. 27.7/8 − 2/3 =
  28. 28.Rohan has a ribbon 1/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  29. 29.A bottle has 1/3 litre of juice. Riya drinks 1/9 litre. How much juice is left (in litres)? =
  30. 30.1/2 − 4/9 =
  31. 31.A bottle has 3/5 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  32. 32.1/4 − 1/8 =
  33. 33.2/3 − 4/7 =
  34. 34.Vihaan has a ribbon 9/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  35. 35.A tank is 4/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  36. 36.2/7 − 1/4 =
  37. 37.Tara has a ribbon 1/2 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 1/3 litre of juice. Rohan drinks 1/5 litre. How much juice is left (in litres)? =
  39. 39.Diya has a ribbon 5/6 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  40. 40.1/6 − 1/9 =

Answer key

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

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