If the number represented by point a on the number axis is a real number a (on the left), then the distance from a to the origin is I think it's a, because according to the number axis, the absolute value of the distance between two numbers, the absolute value of the distance from 0 to - A is a, but the answer is - A, why, if there is a positive a, then the distance between positive a and negative a is a, where is - a? We can only say that the point is - A, but the distance is still a

If the number represented by point a on the number axis is a real number a (on the left), then the distance from a to the origin is I think it's a, because according to the number axis, the absolute value of the distance between two numbers, the absolute value of the distance from 0 to - A is a, but the answer is - A, why, if there is a positive a, then the distance between positive a and negative a is a, where is - a? We can only say that the point is - A, but the distance is still a

If a is less than 0, then the distance from the point to the origin is its absolute value, that is - A. if a is greater than 0, then it is a. the distance from a to - A should be the absolute value of (2a)