How do you evaluate $abs(12-4)-abs(-8+8)-1$ ?

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Answer 1 · 2016-12-01T11:50:00

7

The vertical lines with something in between is called an Absolute value, which is always positive.

So for example $|-3| = 3$

Thus: $|12-4| = +8$

And: $|-8+8| = +0$

But $-|8-8| = -(|8-8|) = -(+0) = -0$

$color(blue)("Putting this all together")$

$|12-4|-|-8+8|-1" "=" "8-0-1 = 7$

How do you evaluate abs(12-4)-abs(-8+8)-1abs(12-4)-abs(-8+8)-1?