Apiece of metal is 1.167 inch thick. how thick would it be if someone milled 0.012 off one side and 0.065 off the other side?

Remaining thickness = 1.09 in

Explanation:
1- getting the value of the milled thickness:
We are given that:
0.012 in was milled off one side
0.065 in was milled off the other sides
This means that:
Total milled thickness = 0.012 + 0.065 = 0.077 in

2- getting the remaining thickness:
Remaining thickness = original thickness - milled thickness
We have:
original thickness = 1.167 in
milled thickness = 0.077 in
Therefore:
Remaining thickness = 1.167 - 0.077 = 1.09 in

Hope this helps :)