Scales With The Number
Order it before 8 hours y 35 minutes and receive it between on Monday 17 and Tuesday 18 with MRW
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.