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

Question

Fill in the missing symbol (?):

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

00:00 Choose the appropriate sign

00:04 Let's start from point (-3) on the negative side of the axis

00:08 The number is directed and negative

00:11 The negative direction on the axis is left, so we'll go 4 to the left

00:18 The number is directed and negative

00:23 The negative direction on the axis is left, so we'll go 7 to the left

00:32 This is the solution for the left side

00:39 Let's find the 2 solutions on the axis

00:43 On the negative side (left) further from point 0 means smaller

00:46 And this is the solution to the question

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:

$-14>-15$

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