Abacus Classroom 3x20
nIn modern arithmetic, multi-base work is demonstrated clearly using this abacus. Very easy to understand addition, abstraction.
size: 30x15cm classroom.
Abacus Classroom 5?20
nIn modern arithmetic, multibase work is demonstrated clearly using this abacus. Very easy to understand addition, abstraction.
nSize: 31x23 cm Classroom.
Abacus Classroom 5x20
In modern arithmetic, multi-base work is demonstrated clearly using this abacus. Very easy to understand addition, abstraction.
Size: 31x28 cm Classroom.
Keyestudio
