craftyindividual@lemm.eeM to artporn@lemm.ee · 10 months agoMental Calculation. In Public School of S. A. Rachinsky - Nikolay Bogdanov-Belsky (1895)upload.wikimedia.orgimagemessage-square3fedilinkarrow-up178arrow-down11
arrow-up177arrow-down1imageMental Calculation. In Public School of S. A. Rachinsky - Nikolay Bogdanov-Belsky (1895)upload.wikimedia.orgcraftyindividual@lemm.eeM to artporn@lemm.ee · 10 months agomessage-square3fedilink
minus-squarekrewjew@lemmy.worldlinkfedilinkarrow-up9·10 months agoNever seen this before. It’s incredible!
Never seen this before. It’s incredible!