https://www.youtube.com/watch?v=9B-tj4muHHgthe way you go from tens to ones in this number line is to the idea of a "number line"
what this
https://en.wikipedia.org/wiki/File:MyPyramidFood.svgis to the idea of a "food pyramid"
a complete, total failure to use the visual aid to help provide perspective on relative sizes of things and how differently-sized things fit in relation to each other
but i'm not nearly as angry watching this video as i had been when i'd first seen that "food pyramid"... i think i'm finally mellowing out in my old age, or just more initially confused (and less inclined to assume the worst given that "food pyramid" came right out of Bush 2)