Perform the operation
-3 + (-10)
-3 + (-10) = -3 - 10 = -13
To perform the operation -3 + (-10), you simply add the two numbers together:
-3 + (-10) = -3 - 10
Now, to simplify this expression, you add the numbers:
-3 - 10 = -13
Therefore, -3 + (-10) equals -13.