||The primitive men between 50 thousand years and ten thousand years, did not feel the need to count, the nature supplied all their needs. Counting began with the development of human activities, when man ceased to be a collector of food in nature, to establish a fixed dwelling, taking away his survival from what he produced, this brought profound changes in human behavior.
By ceasing to be nomadic, about ten thousand years ago, man established fixed housing, agriculture and animal husbandry, became a commercial activity. With increasing agricultural production and herds, brands, stones and we have made it insufficient to determine quantities. There was a need to create symbols that could represent more efficiently and less labor, the volumes of animal and agricultural production.
The necessity of this brief history, so that we can situate ourselves of man's need to have a numbering system. Natural numbers are the main numbering system, from which we build the others.
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