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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 413 · 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. 1.2/3 − 4/9 =
  2. 2.8/9 − 5/6 =
  3. 3.A tank is 3/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  4. 4.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? =
  5. 5.A bottle has 1/3 litre of juice. Kabir drinks 1/8 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 2/3 litre of juice. Diya drinks 4/9 litre. How much juice is left (in litres)? =
  7. 7.Diya has a ribbon 3/4 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  8. 8.7/10 − 1/6 =
  9. 9.2/5 − 1/4 =
  10. 10.1/2 − 2/9 =
  11. 11.2/9 − 1/6 =
  12. 12.5/6 − 1/4 =
  13. 13.A bottle has 2/3 litre of juice. Rohan drinks 2/9 litre. How much juice is left (in litres)? =
  14. 14.2/3 − 5/9 =
  15. 15.Aarav has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  16. 16.1/5 − 1/6 =
  17. 17.9/10 − 3/4 =
  18. 18.Diya has a ribbon 5/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  19. 19.5/6 − 1/9 =
  20. 20.A bottle has 4/5 litre of juice. Riya drinks 7/10 litre. How much juice is left (in litres)? =
  21. 21.9/10 − 1/6 =
  22. 22.5/6 − 2/9 =
  23. 23.A bottle has 3/10 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  24. 24.1/2 − 3/7 =
  25. 25.3/4 − 4/7 =
  26. 26.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? =
  27. 27.5/8 − 1/3 =
  28. 28.Riya has a ribbon 3/4 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  29. 29.A bottle has 2/3 litre of juice. Aarav drinks 4/9 litre. How much juice is left (in litres)? =
  30. 30.3/10 − 1/6 =
  31. 31.1/2 − 3/10 =
  32. 32.4/5 − 3/4 =
  33. 33.3/5 − 1/2 =
  34. 34.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? =
  35. 35.A bottle has 2/3 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 7/9 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  37. 37.1/2 − 3/8 =
  38. 38.7/8 − 1/4 =
  39. 39.3/5 − 1/6 =
  40. 40.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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