Sistema de Numeración Decimal 1-3

 https://drive.google.com/file/d/11xd7lvCIK2jYSmZ3huBW7M0BKQHI4jwT/view?usp=sharing

Sistema de Numeración Decimal 1-2

https://drive.google.com/file/d/1XhncB1ln1a6lR1BovEhT4FO-ag0iQuoT/view?usp=sharing