Descargar muestra
Detalles del fichero
Publicado: 2016-08-20 12:26:01.733842 Categoría: Mathematics Tipo: Vector Model release: NoShare
European abacus counting frame. Calculating tool with rainbow colored beads sliding on wires. Used in pre- and in elementary schools as an aid in teaching the numeral system and arithmetic or as toy.
Contributor: Peter Hermes Furian
ID : 118674689
){kind=link}