50+10(8*1)+2
what property do you use to solve this and how.

You need to use PEMDAS
So first you do the parenthesis.
8*1=8.
So now re-write the problem.
50+10*8+2
Now you are going to multiply.
10*=80
Now re-write the problem again. 
10+80+2
10+80=90+2=92
So the answer to this problem is 92.

You should use PEMDAS
(parenthesis, exponents, multiply, divide, add, and subtract)
you can remember it by using 
Please Excuse My Dear Aunt Sally

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .