Applying Order of Operations to MixedOperator Expressions
Often an expression contains at least one addition or subtraction operator and at least one multiplication or division operator. These expressions are mixedoperator expressions. To evaluate them, you need some stronger medicine.
Expression  Example  Rule 

Contains only addition and subtraction  12 + 7 – 6 – 3 + 8  Evaluate left to right. 
Contains only multiplication and division  18 ÷ 3 x 7 ÷ 14  Evaluate left to right. 
Mixedoperator expression: contains a combination of addition/subtraction and multiplication/division 
9 + 6 ÷ 3  1. Evaluate multiplication and division left to right. 2. Evaluate addition and subtraction left to right. 
Evaluate mixedoperator expressions as follows:

Evaluate the multiplication and division from left to right.

Evaluate the addition and subtraction from left to right.
For example, suppose you want to evaluate the following expression:
As you can see, this expression contains addition, multiplication, and division, so it’s a mixedoperator expression. To evaluate it, start by underlining the multiplication and division in the expression:
Now evaluate what you underlined from left to right:
At this point, you’re left with an expression that contains only addition, so you can evaluate it from left to right:
Thus,