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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 174 · 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. 1.3/4 − 2/7 =
  2. 2.Arjun has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 1/3 litre of juice. Sara drinks 2/9 litre. How much juice is left (in litres)? =
  4. 4.5/6 − 2/3 =
  5. 5.7/9 − 1/3 =
  6. 6.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? =
  7. 7.3/5 − 1/4 =
  8. 8.2/3 − 3/5 =
  9. 9.Meera has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  10. 10.Arjun has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  11. 11.A tank is 4/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  12. 12.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  13. 13.A tank is 6/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  14. 14.A bottle has 2/7 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  15. 15.1/2 − 2/5 =
  16. 16.3/4 − 4/7 =
  17. 17.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  18. 18.Arjun has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  19. 19.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  20. 20.A bottle has 2/3 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  21. 21.A bottle has 8/9 litre of juice. Tara drinks 2/3 litre. How much juice is left (in litres)? =
  22. 22.A bottle has 7/9 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  23. 23.6/7 − 1/3 =
  24. 24.A bottle has 3/4 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  25. 25.1/3 − 1/8 =
  26. 26.8/9 − 2/3 =
  27. 27.1/6 − 1/9 =
  28. 28.Vihaan has a ribbon 3/4 m long and cuts off 5/7 m. How long is the ribbon now (in m)? =
  29. 29.2/5 − 1/10 =
  30. 30.A bottle has 1/2 litre of juice. Arjun drinks 3/10 litre. How much juice is left (in litres)? =
  31. 31.Kabir has a ribbon 7/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  32. 32.Meera has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  33. 33.A bottle has 7/9 litre of juice. Anaya drinks 2/3 litre. How much juice is left (in litres)? =
  34. 34.8/9 − 1/2 =
  35. 35.A bottle has 2/5 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 3/4 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  37. 37.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 1/3 litre of juice. Diya drinks 1/7 litre. How much juice is left (in litres)? =
  39. 39.Rohan has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  40. 40.A tank is 2/3 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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