Solve Integer Expression: 4 + 3 + (-6) + (-9)

First, let's look at the first exercise:

$4+3$

We will locate the number 4 on the axis, and move right three steps, where each step represents a whole number in the following way:

We can see that we reached the number 7.

Now we get the exercise:

$7+(-6)+(-9)=$

Let's look at the exercise:

$7+(-6)=$

We will locate the number 7 on the axis, and move left six steps, where each step represents a whole number in the following way:

We can see that we reached the number 1.

Now we got the exercise:

$1+(-9)=$

We will locate the number 1 on the axis, and move left nine steps, where each step represents a whole number in the following way:

We can see that we reached the number minus 8.