#### Answer

$-1$

#### Work Step by Step

RECALL:
$a-b = a+ (-b)$
Thus,
$-12-(-11)
\\= -12+11 $
The numbers being added have different signs. To add the numbers, perform the following steps:
(1) Subtract the bigger absolute value by the smaller absolute value to obtain:
$|-12| - |11| =12-11 =1$
(2) The sum of the two numbers will be the same as the sign of the number with the bigger absolute value.
Note that $|-12| \gt |11|$.
Thus,
$-12+11 = -1$