**Number Zero Definition and Facts - Science Notes and Projects**
https://sciencenotes.org/number-zero-definition-and-facts/

WEBDec 19, 2021 · In mathematics, zero is both a placeholder digit in numerals and a number with a value of none. Here is a collection of facts about the number zero, a look at its history, and its mathematical rules. History. People started using zero (mostly as a placeholder) in Babylon, Central America, and Egypt some time in the 2nd millennium BC.

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