Before units counting is sensible?
By doing it graphically, yes! Look at 2D-square matrixes 0…9 or 00…99 or a higher order to memorize before-units! Zero-start positions of ‘y’ and ‘x’ directions help us to memorize ‘all 2D square matrix positions’ as ‘a-unit increasing number steps’ (starting from a left top corner zero-start)! Row numbers (y) increase like lines of a page’ and column numbers (x) increase like letters of a line (when it is a left to right reading). Merged ‘yx’ numbers (00…99) also increase by a-unit (in a page reading order). Same logic applies to 3D ‘zyx’ merged-numbers imagined within ‘a cube space’! A number 634785 can be instantly split as z=63, y=47, x=85 or as y=634, x=785.
