Understanding Absolute Value and Negation
The positive value of a number is its absolute value. It tells you the distance of a number from zero on the number line. Placing bars ( ) around a number or expression gives you its absolute value:

The absolute value of a positive number is positive. The absolute value of 8 is 8, which equals 8.

The absolute value of a negative number is positive. The absolute value of –8 is –8, which equals 8.
Attaching a minus sign (–) negates a number or expression:

Negating a positive number makes it negative. To negate the number 3, attach a minus sign to it, changing it to –3.

Negating a negative number makes it positive. To negate the number –3, attach a minus sign to it, changing it to –(–3), which equals 3.