Question 245850
The vertical bars not only indicate absolute value but they also function as grouping symbols (like parentheses). So just like with parentheses we simplify from the inside out:
{{{abs(abs(-1) - abs(-8))}}}
Since {{{abs(-1) = 1}}} and {{{abs(-8) = 8}}} this simplifies to:
{{{abs(1 - 8)}}}
and 1 -8 = -7:
{{{abs(-7)}}}
which equals
7