▲ 30 ▼ Mental arithmetic competition of the 2026 Zhongzhou Cup (lemmy.today) submitted 3 months ago by sanitation@lemmy.today to c/interestingasfuck@lemmy.world 13 comments fedilink hide all child comments
[–] Fedegenerate@fedinsfw.app 1 point 3 months ago* Chisanbop, kungfu math, or finger abacus if you want to read more. permalink fedilink source