Decameter and decimeter

Following the acquisition of the abstract concept of number and its graphical representation, man needed to create a numbering or numeral system that would allow him to comfortably work with large quantities. To do this man needed to create a hierarchical system of multiple orders or levels, so that a certain number of units of a level were to become higher-level unit and so on. The criterion for organizing such a system is called “base”. So between us ten units are a set of ten and ten tens are one hundred or a century and ten hundreds are a thousand.

What does “leap-year” mean? Where does the term “twice sixth year” come from?

Translator´s Note that may help English- speaking readers to understand this text better: leap-year in Latin and modern Latin languages is called “bi sextum” year, like “twice sixth” year. This, as you will check later, is essential to be taken into account before starting to read this article in order to be able to understand it properly.

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