Introduction to decimal quantity

The material for the Introduction to decimal quantityis a material for the development of the mathematical mind that accompanies the child to the knowledge of quantities, i.e. of units, tens, hundreds and thousands and their terminology, and thus indirectly lays the foundations for the knowledge of hierarchies, of geometrical shapes such as the point represented by the bead of the unit, the line represented by the stick of the tens, the square represented by the hundreds and the cube represented by the thousands.