4 ms·

check this out http://upload.wikimedia.org/wikipedia/commons/a/a7/BogdanovBelsky_UstnySchet.jpg http://upload.wikimedia.org/wikipedia/commons/a/a7/BogdanovB...

by migiale 16y ago

check this out http://upload.wikimedia.org/wikipedia/commons/a/a7/BogdanovBelsky_UstnySchet.jpg http://upload.wikimedia.org/wikipedia/commons/a/a7/BogdanovB... this is a painting from 1895 pupils were supposed to do calculations like the one on the blackboard in their heads, without any writing

varjag 16y ago
It's not algebra, you wouldn't have gotten to MIT with that even back then.