Download: free
Website: Thingiverse
Tags:
abaci, abacus, curriculum, makerbotacademymath, soroban, suan pan,
Download: free
Website: Thingiverse
Tags:
abacus, arithmetic, history, roman,
Download: free
Website: Thingiverse
Download: free
Website: Thingiverse
Tags:
abaci, abacus, collapsable, math, mathematics, mini,