Example №2: Adding the $6$-bit numbers $7_{10} = 000111_2$ and $10_{10} = 001010_2$:
111 <-- carry bits
000111
+ 001010
______
010001
Adding positive numbers is the same as with sign & magnitude (except that we add an end-around carry if there is such.)
Example №3: Fun Activity: Let's add $-3_{10}$ and $-11_{10}$ in a $8$-bit, $1$'s complement format!
[Hint: First, represent $-3_{10}$ and $-11_{10}$ in a $8$-bit, $1$'s complement format, and then add them.]