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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 418 · 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. 1.1/3 − 2/7 =
  2. 2.A bottle has 9/10 litre of juice. Arjun drinks 3/4 litre. How much juice is left (in litres)? =
  3. 3.7/8 − 2/3 =
  4. 4.7/10 − 1/4 =
  5. 5.4/5 − 1/2 =
  6. 6.8/9 − 1/3 =
  7. 7.3/4 − 3/10 =
  8. 8.Aarav has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  9. 9.9/10 − 1/4 =
  10. 10.A tank is 5/6 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  11. 11.8/9 − 1/6 =
  12. 12.2/5 − 1/3 =
  13. 13.Diya has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  14. 14.A bottle has 1/2 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  15. 15.A tank is 7/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  16. 16.A bottle has 2/3 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  17. 17.1/3 − 1/5 =
  18. 18.Tara has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  19. 19.Meera has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  20. 20.Rohan has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  21. 21.7/8 − 1/2 =
  22. 22.5/8 − 1/4 =
  23. 23.A bottle has 1/3 litre of juice. Rohan drinks 1/9 litre. How much juice is left (in litres)? =
  24. 24.1/2 − 1/9 =
  25. 25.2/3 − 4/9 =
  26. 26.Sara has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  27. 27.3/4 − 2/3 =
  28. 28.6/7 − 1/3 =
  29. 29.1/4 − 1/5 =
  30. 30.Sara has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  31. 31.A bottle has 1/3 litre of juice. Riya drinks 1/9 litre. How much juice is left (in litres)? =
  32. 32.1/2 − 2/5 =
  33. 33.2/3 − 2/7 =
  34. 34.A tank is 5/6 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  35. 35.5/9 − 1/6 =
  36. 36.2/3 − 1/8 =
  37. 37.Rohan has a ribbon 7/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  38. 38.Vihaan has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  39. 39.Riya has a ribbon 5/6 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  40. 40.A bottle has 2/5 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =

Answer key

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

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