Scales With The Number
Buy it now and receive it between on Wednesday 27 and Thursday 28 with Envío a domicilio
Promotes thinking and evolution of basic arithmetic operations. With 20 dumbbells, hand numbered and 10 of the hanger-racks, on each of them. Stands for balance, when there is a relationship of equality between the 2 hands, so the notion of computation and equivalence become fully clear in practice.