> Specifically, people who can imagine images will often do math in their head by imagining doing it on a sheet of paper. And I'm pretty sure that is bad and do

> Specifically, people who can imagine images will often do math in their head by imagining doing it on a sheet of paper. And I'm pretty sure that is bad and doesn't work well. Instead of visualizing written numbers on paper, visualize doing the problem with an abacus [1]. [1] https://en.wikipedia.org/wiki/Mental_abacus https://en.wikipedia.org/wiki/Mental_abacus