Answer
$-3$
Work Step by Step
The addends (numbers being added have) different signs.
To add two numbers with different signs, perform the following steps:
(1) Subtract the smaller absolute from the bigger absolute value.
$|-9|-|6|=9-6=3$
(2) Use the sign of the number with the bigger absolute value.
$6+(-9)=-3$
Thus, the sum is $-3$.
