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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 918 · 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. 1.5/6 − 3/5 =
  2. 2.1/2 − 1/9 =
  3. 3.A tank is 3/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  4. 4.A tank is 2/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  5. 5.A tank is 1/2 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  6. 6.A tank is 2/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  7. 7.8/9 − 1/2 =
  8. 8.7/10 − 1/4 =
  9. 9.4/9 − 1/3 =
  10. 10.A tank is 3/4 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  11. 11.A tank is 3/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  12. 12.2/3 − 1/10 =
  13. 13.3/4 − 7/10 =
  14. 14.A tank is 1/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  15. 15.2/5 − 1/10 =
  16. 16.A bottle has 3/4 litre of juice. Arjun drinks 5/7 litre. How much juice is left (in litres)? =
  17. 17.2/3 − 1/5 =
  18. 18.7/8 − 2/3 =
  19. 19.4/5 − 1/4 =
  20. 20.3/8 − 1/3 =
  21. 21.Riya has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  22. 22.5/6 − 1/5 =
  23. 23.A tank is 5/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  24. 24.Diya has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  25. 25.A bottle has 4/5 litre of juice. Sara drinks 7/10 litre. How much juice is left (in litres)? =
  26. 26.Vihaan has a ribbon 1/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  27. 27.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? =
  28. 28.5/6 − 3/4 =
  29. 29.5/6 − 5/9 =
  30. 30.4/5 − 1/10 =
  31. 31.Tara has a ribbon 1/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  32. 32.1/4 − 1/8 =
  33. 33.7/9 − 1/6 =
  34. 34.3/5 − 1/6 =
  35. 35.A bottle has 9/10 litre of juice. Rohan drinks 3/4 litre. How much juice is left (in litres)? =
  36. 36.3/7 − 1/3 =
  37. 37.A tank is 5/6 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  38. 38.2/3 − 1/9 =
  39. 39.A bottle has 5/7 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  40. 40.7/8 − 5/6 =

Answer key

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

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