For binara addition

Addition

For binary addition the following rules of binary addition are to be considered:

$0+0=0$

$0+1=1$

$1+0=1$

$1+1=0($earry $||$ to the next column to the left$)$

$1+1+1=1($carry $1$ to the next column$)$

c$.$g$.1$

Add two binary numbers $11011$ and $111.$

Carry

$1111$

$10111$

$+111$

$100010(Answer)$

Can someone explain this?