Question 78687
First you must find the Least common Denominator when adding a fraction with other fractions:
  2 1/4  - - 2 3/12
 18 1/3  - - 18 4/12
+32 1/2  - - 32 6/12
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      - - - -         =   52 13/12
            or  - - - - 53  1/12 (simplified)

The least common denominator is 12
Then you figure how many times does 4 go into 12 which is 3(from the 1/4)
then how many times does 3 go into 12 which is 4(from the 1/3)
then how many times does 2 go into 12 which is 6(from the 1/2)
This works the same way in ALL fractions. You must find the LOWEST Common Multiple that all your added denominators can go into.