Question

Subtract the following with the help of numberline:
$(-2)-7$.

Answer 1

Let subtract $\left(-2\right)-7$

Step-1 Rewrite as an addition problem

$\Rightarrow \left(-2\right)-7=-2-7$

Step-2 Start at the first number in the addition problem, in this case -2

Step-3 Move 7 place to the left.We move 7 to the left because adding negative 7 decrease our number by 7

-2+5 takes us to 1 on the number line

$\Rightarrow \left(-2\right)-7=-9$