Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction.

Following the proper order of operations, you do the problem in the parenthesis first.

(1+2)=(3)

You then multiply first.

2(3)=6

And then finally, we divide.

6/6=1

1.

It's completely dependent on your geographical location whether you are taught PEMDAS or BIDMAS. Here, we are taught PEMDAS.