Auxiliary didactic device for learning basic numbering systems (n), characterized by comprising a plurality of pieces, preferably hexahedra, a plurality of boxes dimensionally suitable to contain exactly one number (n) of pieces of the first group, preferably prismatic boxes -rectangular, a plurality of boxes of larger size, dimensionally adequate to contain exactly one number (n) of boxes and also preferably rectangular prismatic, and so on up to the maximum numeral order provided. (Machine-translation by Google Translate, not legally binding)
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