$\"\"$

The expression is $\"\"$ .

$\"\"$ (Absolute value of 18 is 18 and it is 18 units from zero)

$\"\"$ (Absolute value of $\"\"$ is 5 and it is 5 units from zero)

Locate the integers “18” and “5” on the number line.

$\"absolute$ $\"\"$

Rewrite the expression,

$\"\"$

$\"\"$ (Subtract: $\"\"$ ) $\"\"$

The value of the expression is 13.