How to do divisions to many decimal places mentally?

[Tomasyi]

@Josh Cohen

@Kinma

Here is a quick example dividing by 7.

Thanks… that was so interesting, I’ve been practicing it all afternoon and evening.

I started to notice some patterns…

See also this thread, which is very relevant as it is all about exactly this type of calculation:

Analyzing Rüdiger Gamms performance (division by 109)