memorizing their tables.
Come on, that would be HARD!
Some can’t do that so it’s only fair that
none can do that.
You have it the wrong way around.
It is actually easy to memorize the table and everyone can do it. That is why they do not do it. The goal is not to educate but to prevent education by making everything very confusing. That way only a very few will come out of public education with any sort of idea of what is going on.
These methods are not used in the private schools of the elite.