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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 31 · 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. 1.2/5 − 1/6 =
  2. 2.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  3. 3.A bottle has 9/10 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  4. 4.8/9 − 1/6 =
  5. 5.2/3 − 1/9 =
  6. 6.Meera has a ribbon 5/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  7. 7.7/10 − 1/5 =
  8. 8.3/4 − 5/8 =
  9. 9.Sara has a ribbon 3/4 m long and cuts off 5/7 m. How long is the ribbon now (in m)? =
  10. 10.6/7 − 2/3 =
  11. 11.8/9 − 1/2 =
  12. 12.1/4 − 1/7 =
  13. 13.1/5 − 1/10 =
  14. 14.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? =
  15. 15.A bottle has 7/8 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  16. 16.1/3 − 1/7 =
  17. 17.A bottle has 2/3 litre of juice. Kabir drinks 3/7 litre. How much juice is left (in litres)? =
  18. 18.A tank is 7/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  19. 19.A bottle has 8/9 litre of juice. Rohan drinks 1/2 litre. How much juice is left (in litres)? =
  20. 20.5/6 − 2/9 =
  21. 21.A bottle has 5/6 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  22. 22.1/3 − 1/5 =
  23. 23.9/10 − 2/5 =
  24. 24.2/3 − 1/4 =
  25. 25.2/3 − 1/8 =
  26. 26.6/7 − 3/4 =
  27. 27.7/9 − 1/6 =
  28. 28.Diya has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  29. 29.A bottle has 1/6 litre of juice. Arjun drinks 1/8 litre. How much juice is left (in litres)? =
  30. 30.5/6 − 4/9 =
  31. 31.A bottle has 9/10 litre of juice. Ishaan drinks 3/4 litre. How much juice is left (in litres)? =
  32. 32.A tank is 1/2 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  33. 33.Kabir has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  34. 34.A tank is 1/2 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  35. 35.A tank is 2/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  36. 36.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? =
  37. 37.3/4 − 3/8 =
  38. 38.3/4 − 2/3 =
  39. 39.Arjun has a ribbon 5/6 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  40. 40.A bottle has 9/10 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =

Answer key

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

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