Geometric Hierarchy Of NumberGeometric Hierarchy Of Number Description This material is used to represent in geometric form the hierarchy of number for: 1, 10, 100, 1000, 10,000, 100,000 and 1,000,000. The precise nature of these materials makes it possible to compare by size the decimal categories, visualize through the color coded system the concept of decimal value and the families of number. A wooden tray for presentation of 1, 10, 100 and 1000 is included. Specifications