Solve -3-(-4): Using Number Line to Subtract Negative Numbers

Question

$-3-(-4)=$

00:00 Solve

00:03 Negative times negative always equals positive

00:07 Open parentheses

00:15 The number is directed, negative

00:19 Movement to the negative side on the axis is to the left

00:22 Let's take 3 jumps to the left

00:28 The number is directed, positive

00:31 Movement to the negative side on the axis is to the right

00:34 Let's take 4 jumps to the right

00:39 And this is the solution to the question

Let's remember the rule:

$-(-x)=+$

We'll write the exercise in the appropriate form:

$-3+(4)=$

We'll locate the number negative 3 on the number line, from which we'll move 4 steps to the right (since 4 is greater than zero):

We can see that we've reached the number 1.

$1$