craftyindividual@lemm.eeM to artporn@lemm.ee · 9 months agoMental Calculation. In Public School of S. A. Rachinsky - Nikolay Bogdanov-Belsky (1895)upload.wikimedia.orgimagemessage-square4fedilinkarrow-up182arrow-down11
arrow-up181arrow-down1imageMental Calculation. In Public School of S. A. Rachinsky - Nikolay Bogdanov-Belsky (1895)upload.wikimedia.orgcraftyindividual@lemm.eeM to artporn@lemm.ee · 9 months agomessage-square4fedilink
minus-squarekrewjew@lemmy.worldlinkfedilinkarrow-up9·9 months agoNever seen this before. It’s incredible!
Never seen this before. It’s incredible!