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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 410 · 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. 1.7/8 − 1/4 =
  2. 2.2/5 − 1/10 =
  3. 3.A tank is 9/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  4. 4.5/6 − 3/5 =
  5. 5.A bottle has 1/2 litre of juice. Arjun drinks 1/7 litre. How much juice is left (in litres)? =
  6. 6.5/6 − 4/9 =
  7. 7.Sara has a ribbon 7/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  8. 8.9/10 − 1/6 =
  9. 9.Arjun has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  10. 10.1/4 − 1/6 =
  11. 11.Ishaan has a ribbon 3/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  12. 12.1/6 − 1/9 =
  13. 13.A bottle has 2/3 litre of juice. Diya drinks 2/7 litre. How much juice is left (in litres)? =
  14. 14.3/4 − 5/8 =
  15. 15.2/7 − 1/4 =
  16. 16.8/9 − 1/3 =
  17. 17.7/9 − 2/3 =
  18. 18.6/7 − 1/2 =
  19. 19.9/10 − 1/3 =
  20. 20.A bottle has 9/10 litre of juice. Arjun drinks 2/3 litre. How much juice is left (in litres)? =
  21. 21.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? =
  22. 22.1/2 − 1/5 =
  23. 23.5/6 − 1/2 =
  24. 24.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? =
  25. 25.4/5 − 1/4 =
  26. 26.A bottle has 3/4 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =
  27. 27.4/7 − 1/3 =
  28. 28.A bottle has 5/8 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  29. 29.Vihaan has a ribbon 4/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  30. 30.A tank is 8/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  31. 31.1/4 − 1/10 =
  32. 32.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  33. 33.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? =
  34. 34.4/5 − 7/10 =
  35. 35.1/5 − 1/6 =
  36. 36.2/3 − 3/8 =
  37. 37.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  38. 38.3/7 − 1/3 =
  39. 39.A bottle has 5/8 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  40. 40.5/6 − 5/9 =

Answer key

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

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