NO!!!
Think of the number line.
...-13,-12,-11, ,,,, -1,0,1,....11,12,13....
The half way point between '-12' & '12' is '0' (zero).
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(0 + 12)/2 = 6 this is different from halfway between 1 & 12 because of starting the range at 0
If that's 0 and 12, halfway is 6/1 If that's 0 and 1/2, halfway is 1/4
the answer is 5 over 6 or 10 over 12
It is: (-12+10)/2 = -1
It is: 24