Bibi-binary express any number, it suffices to enumerate the (hexadecimal) digits that make it up. For example: the number written as "2000" in base ten, which translates to "7D0" in conventionally-written hexadecimal, would in Bibi-binary be spoken aloud as "BIDAHO". Contrary to the numeric conventions used in modern computers, the bibi-binary system represents negative numbers using one's complement, rather than two's complement. Thus: and their sum is written as "1 1111" (one of two representations of zero in this system; zero can also be written as "0 0000"). On modern machines, in classic binary notation, −7 would be written 1 1001,
Skew binary number system with formula_8 1s is equal to the binary number formula_9 minus formula_8. Let formula_11 represents the digit formula_12 repeated formula_13 times. The skew binary number of the form formula_14 with formula_8 1s is equal to the binary number formula_16 minus formula_8. Similarly to the preceding section, the binary number formula_18 of the form formula_7 with formula_8 1s equals the skew binary number formula_21 plus formula_8. Note that since addition is not defined, adding formula_8 corresponds to incrementing the number formula_8 times. However, formula_8 is bounded by the logarithm of formula_18 and incrementation takes constant time. Hence transforming a binary number