Add −113+(−423).
To simplify the expression -113 + (-423), we need to add the two numbers together.
First, let's remove the parentheses by changing the signs of the negative numbers inside.
So, -113 + (-423) becomes -113 - 423.
Now, we can add the two numbers together:
-113 - 423 = -536.
Therefore, the sum of -113 + (-423) is -536.