-5 -1

The sum of -5 and -1 is -6.

To solve the expression "-5 -1," follow these steps:

Step 1: Start with the first number, -5.
Step 2: Subtract the second number, 1, from -5.
Step 3: -5 - 1 = -6.

Therefore, the result of the expression -5 - 1 is -6.