Question 1135011
Start from the right hand side,
{{{7-5=2}}}
Next column over,
{{{1-6}}}
We need to borrow from the next column to the left.
In base 10, you would borrow 10 and add but since it's base 8 you borrow 8.
So add 8 to the 1,
{{{8+1=9}}}
So now you can do the subtraction,
{{{9-6=3}}}
So in base 8,
{{{317-265=32}}}