For example: Robertson algorithm for multiplication, Booth's algorithm etc.
I am wondering if there are mathematics books(name pls) that cover these derivations as a form of exercises or examples.
And if you really want to go down a rabbit hole, there's the Computer Arithmetic[3] conference[4] proceedings[5].
[1]: https://en.wikipedia.org/wiki/Hacker%27s_Delight
[2]: https://www.amazon.com/Computer-Arithmetic-Volumes-Earl-Swar...
[3]: https://en.wikipedia.org/wiki/Computer_arithmetic
[4]: https://en.wikipedia.org/wiki/ARITH_Symposium_on_Computer_Ar...