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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 997 · 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. 1.1/6 − 1/9 =
  2. 2.1/3 − 2/9 =
  3. 3.5/6 − 1/9 =
  4. 4.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  5. 5.1/2 − 1/8 =
  6. 6.Vihaan has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  7. 7.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  8. 8.A bottle has 5/6 litre of juice. Arjun drinks 3/8 litre. How much juice is left (in litres)? =
  9. 9.8/9 − 1/2 =
  10. 10.Ishaan has a ribbon 5/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  11. 11.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  12. 12.7/9 − 1/3 =
  13. 13.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? =
  14. 14.8/9 − 1/3 =
  15. 15.2/3 − 1/9 =
  16. 16.4/7 − 1/2 =
  17. 17.5/6 − 4/5 =
  18. 18.A tank is 2/3 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  19. 19.5/9 − 1/6 =
  20. 20.A bottle has 4/5 litre of juice. Kabir drinks 1/10 litre. How much juice is left (in litres)? =
  21. 21.Arjun has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  22. 22.Arjun has a ribbon 2/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  23. 23.Riya has a ribbon 5/6 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  24. 24.4/5 − 1/4 =
  25. 25.7/10 − 3/5 =
  26. 26.A bottle has 8/9 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  27. 27.A bottle has 7/10 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  28. 28.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? =
  29. 29.2/7 − 1/4 =
  30. 30.A tank is 4/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  31. 31.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  32. 32.1/5 − 1/10 =
  33. 33.1/2 − 3/7 =
  34. 34.5/6 − 1/8 =
  35. 35.1/2 − 2/7 =
  36. 36.1/2 − 1/7 =
  37. 37.A bottle has 5/9 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  38. 38.4/5 − 3/4 =
  39. 39.3/4 − 3/10 =
  40. 40.Sara has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =

Answer key

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

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