E&O Montessori Arithmetic Trinomial Cube

This Arithmetic Trinomial Cube represents the equation (a + b + c) cubed cubed in concrete form, and differs from the Trinomial Cube in that the component pieces are color-coded to represent hierarchical values from 1 unit to 1 million. This makes it possible for the child to equate an arithmetical value to each of the cubes and prisms.