But numbers have their own home! That is right, they live on a number line. We can see numbers closer on a number line and we can learn more about them. Some mathematicians spend lives studding numbers and a number line!
If you draw a line on a sheet of paper - that can not be called a number line yet. That would be just a line. But try do this:
- mark a point somewhere on the line and call it zero (0), or the origin
- mark counting numbers (1, 2, 3...) to the right of the origin and their opposites (-1, -2, -3...) to the left of the origin
- add arrows (<- -> ) on both sides of the line to show that there is no limits