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Abacus Classroom 3×20

8.61

Abacus Classroom 3?20
nIn modern arithmetic, multibase work is demonstrated clearly using this abacus. Very easy to understand addition, abstraction.
nSize: 30x15cm classroom.


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Abacus Classroom 3×20 In modern arithmetic, multibase work is demonstrated clearly using this abacus. Very easy to understand addition, abstraction. Size: 30x15cm classroom.