Wie man einen Abakus verwendet: Verbesserung der numerischen Kenntnisse mit Perlen von Lincoln K. B
21,69 €
In a world dominated by calculators and smartphones, have you ever wondered if there's a better, more engaging way to perform calculations?. Develop Spatial Reasoning Skills: The abacus is a visual tool, relying on the manipulation of beads in space to represent numbers.
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