# How do you evaluate 9+9*3-12-:2?

Mar 31, 2018

$9 + 9 \cdot 3 - 12 \div 2 = 30$

#### Explanation:

Follow the order of operations as indicated by the acronym PEMDAS.

Parentheses/brackets

Exponents/powers

Multiplication and Division in order from left to right.

Addition and Subtraction in order from left to right.

$9 + 9 \cdot 3 - 12 \div 2$

There are no parentheses or exponents, so we start with multiplication and division.

Simplify $9 \cdot 3$ to $27$.

$9 + 27 - 12 \div 2$

Simplify $12 \div 2$ to $6$.

9+27-6#

Simplify $9 + 27$ to $36$.

$36 - 6$

Simplify $36 - 6$ to $30$.

$30$