While the concept of zero has been around during Babylonian times or perhaps even earlier, the Indian mathematician Brahmagupta (598-665) was most likely the first to write down how to calculate with a zero. He established rules such as 1+0 = 1 and 1-0 = 1; and 1×0 = 0. Interestingly, he wasn’t as sure as we are now, whether one should divide by Zero.
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