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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 225 · 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 4/7 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  2. 2.9/10 − 3/5 =
  3. 3.1/6 − 1/9 =
  4. 4.Anaya has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  5. 5.Kabir has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  6. 6.Sara has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  7. 7.9/10 − 2/5 =
  8. 8.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? =
  9. 9.A bottle has 1/2 litre of juice. Vihaan drinks 3/10 litre. How much juice is left (in litres)? =
  10. 10.2/7 − 1/4 =
  11. 11.2/3 − 3/7 =
  12. 12.Kabir has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  13. 13.6/7 − 3/4 =
  14. 14.1/2 − 1/9 =
  15. 15.Vihaan has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  16. 16.2/5 − 1/10 =
  17. 17.A bottle has 2/3 litre of juice. Riya drinks 3/7 litre. How much juice is left (in litres)? =
  18. 18.2/5 − 1/3 =
  19. 19.A tank is 2/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  20. 20.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  21. 21.A bottle has 4/7 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  22. 22.A bottle has 9/10 litre of juice. Tara drinks 2/3 litre. How much juice is left (in litres)? =
  23. 23.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  24. 24.A bottle has 2/3 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  25. 25.1/3 − 1/7 =
  26. 26.1/3 − 1/9 =
  27. 27.9/10 − 3/4 =
  28. 28.Rohan has a ribbon 1/3 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  29. 29.1/3 − 1/5 =
  30. 30.Meera has a ribbon 9/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  31. 31.3/5 − 1/10 =
  32. 32.A tank is 1/2 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  33. 33.A tank is 4/5 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  34. 34.2/3 − 1/5 =
  35. 35.1/2 − 1/3 =
  36. 36.Tara has a ribbon 1/2 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  37. 37.Kabir has a ribbon 3/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  38. 38.Rohan has a ribbon 1/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  39. 39.3/4 − 5/8 =
  40. 40.A tank is 9/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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