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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 399 · 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 5/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  2. 2.1/3 − 1/5 =
  3. 3.3/4 − 1/7 =
  4. 4.3/4 − 5/7 =
  5. 5.7/10 − 1/6 =
  6. 6.A tank is 2/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  7. 7.1/3 − 2/7 =
  8. 8.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  9. 9.9/10 − 1/5 =
  10. 10.1/2 − 2/7 =
  11. 11.5/9 − 1/2 =
  12. 12.2/5 − 1/6 =
  13. 13.Arjun has a ribbon 5/6 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  14. 14.A bottle has 3/4 litre of juice. Diya drinks 2/3 litre. How much juice is left (in litres)? =
  15. 15.1/5 − 1/6 =
  16. 16.4/5 − 1/4 =
  17. 17.9/10 − 1/2 =
  18. 18.A tank is 1/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  19. 19.Diya has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  20. 20.5/9 − 1/3 =
  21. 21.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? =
  22. 22.A bottle has 2/3 litre of juice. Arjun drinks 5/8 litre. How much juice is left (in litres)? =
  23. 23.9/10 − 1/3 =
  24. 24.5/6 − 1/2 =
  25. 25.A tank is 5/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  26. 26.5/8 − 1/2 =
  27. 27.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? =
  28. 28.3/5 − 1/3 =
  29. 29.A tank is 5/6 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  30. 30.A tank is 9/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 8/9 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  32. 32.Meera has a ribbon 5/6 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  33. 33.A bottle has 1/3 litre of juice. Vihaan drinks 2/9 litre. How much juice is left (in litres)? =
  34. 34.2/3 − 1/6 =
  35. 35.1/6 − 1/9 =
  36. 36.8/9 − 1/3 =
  37. 37.Diya has a ribbon 5/6 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 5/6 litre of juice. Ishaan drinks 3/8 litre. How much juice is left (in litres)? =
  39. 39.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  40. 40.A tank is 5/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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