Working with addition boards allows the child to memorize the results of adding small numbers, through repetition of the exercise. The boards are outlined in red, which marks the addition material.
The material is composed of two series of circular-shaped insets with green tiles and red circles, divided from whole to tenths; each fraction of the circle is equipped with a grip knob, screwed on for safety; all in painted metal. The wooden shelves are not included in this article and can be purchased separately.
Manufacturer: Montessori BF (Trento, Italy)