Solve (-3) + (-3): Adding Negative Numbers on a Number Line

Let's locate negative 3 on the number line.

Since negative 3 is less than 0, we'll move three steps left from zero, where each step represents one whole number as follows:

Now let's look at the operation in the exercise.

Since the operation is $+(-3)$

and negative 3 is less than 0, we'll move three steps left from negative 3, where each step represents one whole number as follows:

We can see that we arrived at negative 6.