Some people can be fooled by this problem

PEMDAS = Please Excuse My Dear Aunt Sally

Parentheses, exponants, multiplication, division, addition, subtraction. Always do Math in that order.

Given that we have:

1+1+1+1+1+1+1+1+1+1×0

1+1+1+1+1+1+1+1+1+0

9

It is $\textbf{NOT}\;(1+1+1+1+1+1+1+1+1+1)\times0$ .It is $9\times1+1\times0=\boxed{9}$

This problem is just play with the rule of basic calculation. You must do (x) first then (+).