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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 47 · 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 − 2/5 =
  2. 2.1/2 − 2/9 =
  3. 3.2/3 − 2/5 =
  4. 4.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  5. 5.8/9 − 2/3 =
  6. 6.5/8 − 1/6 =
  7. 7.5/7 − 1/2 =
  8. 8.A bottle has 2/3 litre of juice. Diya drinks 4/9 litre. How much juice is left (in litres)? =
  9. 9.3/4 − 3/7 =
  10. 10.A bottle has 2/3 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  11. 11.3/4 − 3/8 =
  12. 12.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? =
  13. 13.A bottle has 1/2 litre of juice. Diya drinks 1/8 litre. How much juice is left (in litres)? =
  14. 14.8/9 − 5/6 =
  15. 15.A bottle has 9/10 litre of juice. Tara drinks 4/5 litre. How much juice is left (in litres)? =
  16. 16.A tank is 5/6 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  17. 17.3/4 − 4/7 =
  18. 18.A bottle has 5/6 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  19. 19.A bottle has 3/7 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  20. 20.2/3 − 3/8 =
  21. 21.3/4 − 2/3 =
  22. 22.A tank is 3/4 full of water. Then water filling 5/7 of the tank is used. What fraction of the tank is full now? =
  23. 23.1/3 − 1/4 =
  24. 24.A bottle has 3/5 litre of juice. Riya drinks 1/10 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 5/6 litre of juice. Diya drinks 1/9 litre. How much juice is left (in litres)? =
  26. 26.A tank is 5/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  27. 27.2/9 − 1/6 =
  28. 28.A tank is 3/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  29. 29.5/9 − 1/6 =
  30. 30.A bottle has 2/3 litre of juice. Tara drinks 1/9 litre. How much juice is left (in litres)? =
  31. 31.Rohan has a ribbon 2/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  32. 32.A bottle has 1/4 litre of juice. Anaya drinks 1/5 litre. How much juice is left (in litres)? =
  33. 33.3/8 − 1/4 =
  34. 34.A tank is 7/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  35. 35.3/10 − 1/6 =
  36. 36.2/5 − 1/4 =
  37. 37.7/9 − 1/6 =
  38. 38.3/4 − 1/10 =
  39. 39.7/8 − 5/6 =
  40. 40.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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