Question

Find the value of $(-7)-(-9)$ using number line.

Answer 1

$(-7)-(-9)$ is equal to $-7+9$ (Since $-9$ is additive inverse of 9$)$.

On the number line, start from $-7$ and move 9 units to right, we will reach 2 .

So $(-7)-(-9)=-7+9=2$.