Over hundreds of years, the idea of zero was passed from country to country, from India and Babylon to other places, like Greece, Persia and the Arab world. In India, zero was theorized in the seventh century by the mathematician Brahmagupta. For example, the year after 1 BC is AD 1 (there is no year zero). Some places and countries did not know about zero, which may have made it harder for those people to do mathematics. The idea of zero was first thought about in Babylon, India and in Central America at different times. The following table includes all of the above examples along with other operations in a condensed, generalized form (where x represents any number). In particular, zero divided by zero has no answer.Any number divided by zero has no answer.For example, dividing zero by forty-three gives zero. Dividing zero by a number always gives zero.For example, multiplying forty-three by zero gives zero. Multiplying a number by zero always gives zero.Subtracting a positive number from zero always makes that number negative (or, if a negative number is subtracted from zero, it makes the number positive).For example, subtracting zero from three gives three. Subtracting zero from a number always gives that number.For example, adding zero to three gives three. Adding a number to zero results in that number.
This means that if a number is added to 0, then that number would remain unchanged. It is the additive identity of common numbers. For example, if a person has zero hats, that means they do not have any hats. If there are zero things, then there is nothing at all. 0, zero, "oh" / ˈ oʊ/, nought, naught, nil, o, 〇
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