Solve: (-3) + (-4) + (-7) ? -15 - Finding the Missing Operation

Fill in the missing symbol (?):

$(-3)+(-4)+(-7)\text{?}-15$

Let's solve the equation:

$(-3)+(-4)+(-7)=$

We'll first need to locate -3 on the number line and move four steps to the left (since minus 4 is less than zero):

This will bring us to the number -7.

Now let's move seven steps to the left (since minus 7 is less than zero):

This leaves us at the number -13..

The solution to the equation is:

$(-3)+(-4)+(-7)=-14$

Therefore, the missing sign must be:

$-14>-15$