### Negative Binary Numbers

A non-standard positional notation is one where the value of each position isn’t necessarily a straightforward power of the radix. I am also including when the radix is not a positive integer (such as -2), even though mathematically the representation is consistent with standard positional notation. By altering the interpretation of one or more of the place values (or the radix) of a binary representation, we are able to represent negative values. In this post I’ll be covering sign-magnitude, the most intuitive method, the radix complement methods (ones’ complement and two’s complement), offset binary (also known as excess-k or biased), and base -2 (base negative two).