# How do you evaluate −12 + 16?

May 13, 2018

4

#### Explanation:

Note that $\textcolor{red}{16}$ can and may be written as $\textcolor{red}{+ 12 + 4}$

So $\textcolor{g r e e n}{- 12} \textcolor{red}{+ 16}$ is the same as $\underbrace{\textcolor{g r e e n}{- 12} \textcolor{red}{+ 12}} \textcolor{red}{+ 4}$
$\textcolor{w h i t e}{\text{ddddddd.ddddddddddddddd}} \downarrow$
$\textcolor{w h i t e}{\text{ddddddddddd.dddddddd.ddd")0color(white)("dd..}} + 4$

So $- 12 + 16 = 4$