# How do you simplify (21-3)-(4+2)+(3+5)?

Mar 10, 2016

$\left(21 - 3\right) - \left(4 + 2\right) + \left(3 + 5\right) = \textcolor{b l u e}{20}$

#### Explanation:

PEMDAS is an acronym that helps to remember the order of operations.

For the expression $\left(21 - 3\right) - \left(4 + 2\right) + \left(3 + 5\right)$, carry out the operations inside each set of parentheses first.

$18 - 6 + 8$

Carry out the addition and subtraction from left to right.

$18 - 6 + 8 = 20$