With the chains of squares the qudrature could be deepened, for example 5 x 5. The chains of cubic and cubes illustrate arithmetic operations like 9 x 9 x 9. This means that large numbers will be comprehensible and easy to understand for small children. Example of use: showing and learning of a quadrature of a number Control for success: is guaranteed with comparing and counting the pearls. The article consists of 10 chains of squares (1-10), 10 chains of cubic (1-10), 10 cubes (1-10) 1single pearl; pearl squares from 1-10 material: plastic, diameter approx. 7Mm
Orders are at the moment only possible on our german homepage. For more details look at pearl material, complete with cubes, squares and pearl chains at our german homepage.