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For most people, getting into the world of addition and subtraction is anything but easy. At first, the abstract world of the numbers appears to be enigmatic and incomprehensible. With this 100-piece calculation aid, calculation processes can be grasped in the truest sense and, above all, they can be seen. A basic understanding of the world of numbers is created playfully in a simple, intuitive way. Everyone deserves to have this help at the beginning!