Question

Can someone pleaseexplain to me how to do these?

Answer 1

Well those are absolute values 

absolute values are term used in math to indicate the distance of a point from its origin ( which is zero )

so number four would be 3 because it is 3 points away from zero on the number line. number five would be 5 because it is 5 points away from zero on the number line. I hope this makes sense