Raidho

 
registriert seit: 14.07.2016
I never saw a wild thing sorry for itself...
Punkte36mehr
Naechstes Level: 
Benötigte Punkte: 164
Letzte spiele
9 Ball Pool

9 Ball Pool

9 Ball Pool
6 Jahre 180 Tage her

Mental calculation

Nikolay Petrovich Bogdanov-Belsky. Mental calculation. In the public school of S.A. Rachinsky (1895).

231011962

No calculators. No paper. No pens. Only own wits.
A rural Russian school. The late XIXth century.
Is it too much for you?