Subtracting with a serial adder?

Question

Algorithms

How to implement subtraction using serial adder?
I can't find anything detailed, with a clear description and good examples. Required for a course project.
In particular, we are interested in subtraction using the sequential adder of the function: B - 3, where B = 1 11.01

Answer 1

Did you look in the manual or handbook?
What information was found and what is not clear?
Try to learn and solve your private problems on your own.
If for each ignoramus to solve his problems, there will not be enough time.

Answer 2

Look at the books of Pukhalsky (circuitry) and Ugryumov (digital circuitry), everything is laid out in principle on the fingers. Master the theory yourself, understand the principle, it will be better, but you will make the project yourself and everything will be fine