Solve (-12)+(-2)+4?-15: Finding the Missing Number in a Sequence

Question

$(-12)+(-2)+4\text{?}-15$

00:00 Choose the appropriate sign

00:03 Let's start from the point (-12) on the negative side of the axis

00:06 The number is directed and negative

00:10 The negative direction on the axis is to the left, so we'll go 2 units left

00:16 The number is directed and positive

00:21 The positive direction on the axis is to the right, so we'll go 4 units right

00:34 This is the solution for the left side

00:44 Let's find both solutions on the axis and see which one is larger

00:47 On the left side, further from point 0 means it's smaller

00:51 And this is the solution to the question

Let's first solve the following equation:

$(-12)+(-2)+4=$

We'll then locate -12 on the number line and move two steps to the left (since -2 is less than zero):

This puts us at the number -14.

Now let's move 4 steps to the right (since 4 is greater than zero):

We've reached the number minus 10.

Therefore, the solution to the equation is:

$(-12)+(-2)+4=-10$

The appropriate sign will be:

$-10>-15$

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