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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 481 · 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. 1.7/10 − 3/5 =
  2. 2.A bottle has 8/9 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  3. 3.1/2 − 1/7 =
  4. 4.5/6 − 2/9 =
  5. 5.3/10 − 1/5 =
  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. 7.4/7 − 1/3 =
  8. 8.A bottle has 1/4 litre of juice. Sara drinks 1/8 litre. How much juice is left (in litres)? =
  9. 9.Kabir has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  10. 10.A bottle has 1/2 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  11. 11.1/3 − 3/10 =
  12. 12.5/7 − 2/3 =
  13. 13.2/3 − 1/9 =
  14. 14.7/8 − 1/3 =
  15. 15.A bottle has 2/5 litre of juice. Rohan drinks 1/10 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 1/4 litre of juice. Diya drinks 1/5 litre. How much juice is left (in litres)? =
  17. 17.1/3 − 2/9 =
  18. 18.A tank is 6/7 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  19. 19.5/6 − 1/9 =
  20. 20.1/2 − 1/4 =
  21. 21.A tank is 3/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  22. 22.A tank is 4/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  23. 23.1/3 − 1/6 =
  24. 24.2/3 − 4/9 =
  25. 25.A bottle has 2/3 litre of juice. Diya drinks 4/7 litre. How much juice is left (in litres)? =
  26. 26.A tank is 9/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  27. 27.A bottle has 1/4 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  28. 28.A bottle has 3/8 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  29. 29.1/2 − 1/9 =
  30. 30.1/2 − 3/7 =
  31. 31.1/4 − 1/5 =
  32. 32.Ishaan has a ribbon 4/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  33. 33.7/9 − 1/2 =
  34. 34.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  35. 35.A tank is 8/9 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  36. 36.A bottle has 9/10 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  37. 37.6/7 − 2/3 =
  38. 38.1/5 − 1/6 =
  39. 39.Diya has a ribbon 2/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  40. 40.A bottle has 5/9 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =

Answer key

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

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