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I am trying to understand the logic behind the arithmetic of one\two complement. Why I can sum\subtract numbers with this method and get the right answer, and why all the issue of "carry" works in this two method as it works? Someone could help?

Victor
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  • Number theory. Arithmetic in ℤ/2ⁿℤ, the congruence classes of integers modulo 2ⁿ. – Raymond Chen Jul 10 '15 at 17:28
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    possible duplicate of [Why is two's complement used to represent negative numbers?](http://stackoverflow.com/questions/1125304/why-is-twos-complement-used-to-represent-negative-numbers) – Raymond Chen Jul 10 '15 at 17:29

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