Step-by-step explanation:
It isn't very clear what you're asking but... here goes...
The opposite of the absolute value of -8 is 8 because if the absolute value of -8 is positive then the opposite of it would be negative.
On a number line it shows that the number is below zero (making it negative) and the opposite of a negative is a positive, but if the absolute value of -8 is positive then the opposite would be negative.
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-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 -0 1 2 3 4 5 6 7 8 9 10