Issue with 8-bit adder

Posted by kingpinzs on Jan 20, 2013; 1:02am
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Issue-with-8-bit-adder-tp4026131.html

I made my 8-bit adder from two 4-bit adders
the thing is that if I add the following I get the shown results

7+10 = 17  0111
               1010
             10001

8+10 = 2   1000
9+10 = 3   1001
10+10 = 4 1010
11+10 = 5 1011
12+10 = 6 1100
13+10 = 7 1101
14+10=24  1110