Question

Why is 2 + (−3) equal to −1?

Because it is 3 units to the left of 2 on a horizontal number line
Because it is 3 units to the right of 0 on a horizontal number line
Because it is 3 units to the left of 0 on a horizontal number line
Because it is 3 units to the right of 2 on a horizontal number line

Answer 1

$2 + ( - 3) = 2 - 3 = - 1$
Because the negative symbol is before the larger no. So the answer will be in negative

Answer 2

So you are adding minus three to 2 meaning that you are taking away three instead of adding 3.