If I have the expression: 1011 0000 1110-1000 1110 0001----------------Then, I find the twos complement of the second number:  0111 0001 1110+0000 0000 0001--------------- 0111 0000 1111I then add this to the first number: 1011 0000 1110+0111 0000 1111--------------- 0010 0001 1101But the answer given is: 0010 0001 1100Can anybody see my error? 
Twos complement arithmetic
arithmetic