I still do math in my head, even when on the computer and the “calculator” icon is there. I still taught my grandkids how to tell time on an analog clock with no numbers just by the position of the hands. I’ve run into kids brought up on digital clocks that can’t do that. Dunno how important that is, but it struck my fancy.
Same thing with directions absent GPS. If you know where you are and what direction you need to go to get to your destination, you can eventually get there fairly easily by referring to a map and looking for relevant road signs on the way to find the exact address. Absent a compass and a sense of direction, folks need to know how to determine direction by the sun’s position and time of day. Most people have ABSOLUTELY NO IDEA!!
JC