# How do you simplify 25 + "-"45?

Jun 12, 2016

$25 + \left(- 45\right) = \textcolor{g r e e n}{- 20}$

#### Explanation:

In general $a + \left(- b\right)$ is the same as $a - b$

So $25 + \left(- 45\right)$ is the same as $25 - 45$

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If you have difficulty subtracting a larger number from a smaller number:

Remember, in general $\left(a - b\right)$ is the same as $- \left(b - a\right)$

So
$\textcolor{w h i t e}{\text{XXX}} 25 - 45 = - \left(45 - 25\right) = - \left(20\right)$