I am trying to find how did they get the output on the first adder and the output on the second adder....Thanks for your help

 

Hello,

The zipfile does not contain any picture , just a link on your computer.
Please give more information.

Greetings,
Bertus

 

The attachment is apparently to a folder on your computer. Try posting the file and not the shortcut.

 

Here is a datasheet for the adder in question:
http://www.tranzistoare.ro/datasheets/70/248191_DS.pdf Page two shows how the outputs are derived.