10 baza 10 ==> 1010
C1(1010)   --> 0101
C2(1010)   --> 0110

Metoda 1-a (cu C1)
 1010+
 0110
-----
10000

Metoda a 2-a
0110
----------------
 10101000 -->168
 01011000 -->88 C2(10101000) --> -168
-------------
100000000