How do you simplify $(- 3) + (- 18) + 30$ $(−3) + (−18) + 30$ ?

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Answer 1 · 2018-03-19T00:32:18

$9$ $9$

The parenthesis around $- 3$ $-3$ and $- 18$ $-18$ are unnecessary, thus we have:

$- 3 + (- 18 + 30)$ $-3+(color(blue)(-18+30))$

What I have in blue can be rewritten as $30 - 18$ $30-18$ , which is $12$ $12$ , thus we have:

$12 - 3$ $12-3$ , which is of course $9$ $9$ .

How do you simplify (−3)+(−18)+30(−3) + (−18) + 30?