Numbers as visible shapes

Milosav M. Marjanović, Aleksandra N. Mandić

The aim of this note is to stipulate requirements for number pictures (corresponding manipulatives) in order to make them convenient for visual representation of numbers and arithmetic operations. These requirements are: uniform representing of the unit of counting, respecting of counting by one, projecting of the number value at the first glance, stability of the shape of arrangements, easy way of drawing or completing of arrangements by children, possibility to represent numbers and operations within larger blocks.