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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 61 · 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 tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  2. 2.Aarav has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  3. 3.Vihaan has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  4. 4.A bottle has 5/6 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  5. 5.A bottle has 1/2 litre of juice. Ishaan drinks 3/10 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 3/5 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  7. 7.7/10 − 3/5 =
  8. 8.3/7 − 1/3 =
  9. 9.A bottle has 6/7 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  10. 10.Aarav has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  11. 11.5/6 − 3/10 =
  12. 12.1/5 − 1/10 =
  13. 13.A bottle has 5/9 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  14. 14.5/9 − 1/3 =
  15. 15.A tank is 4/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  16. 16.A bottle has 7/10 litre of juice. Diya drinks 3/5 litre. How much juice is left (in litres)? =
  17. 17.1/2 − 3/8 =
  18. 18.A bottle has 4/5 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  19. 19.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  20. 20.A bottle has 3/4 litre of juice. Sara drinks 4/7 litre. How much juice is left (in litres)? =
  21. 21.Sara has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  22. 22.4/7 − 1/2 =
  23. 23.A tank is 4/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  24. 24.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  25. 25.3/8 − 1/3 =
  26. 26.5/9 − 1/2 =
  27. 27.1/3 − 1/7 =
  28. 28.1/4 − 1/7 =
  29. 29.7/8 − 1/3 =
  30. 30.Aarav has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  31. 31.1/2 − 1/8 =
  32. 32.1/2 − 1/10 =
  33. 33.6/7 − 1/4 =
  34. 34.A bottle has 5/6 litre of juice. Sara drinks 1/9 litre. How much juice is left (in litres)? =
  35. 35.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? =
  36. 36.A bottle has 5/6 litre of juice. Aarav drinks 7/9 litre. How much juice is left (in litres)? =
  37. 37.A tank is 7/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  38. 38.8/9 − 5/6 =
  39. 39.3/8 − 1/6 =
  40. 40.A bottle has 4/5 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =

Answer key

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

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