Panel plate for blackboard in school - has line of figures for representation of calculations such as addition, subtraction, multiplication and division

摘要

Panel plate for blackboard has line of figures for representations such as addition, subtraction multiplication and division. The length of the panel plate is considerably greater than its height. The line of figures is permanently arranged in approx. the middle of the height of the plate. Along the line of figures, symbols are provided on one side and a free space on the other side. Alternatively, strips are provided with symbols and mounted on the free space. The strips are detachable or can be displayed. The panel plate is made of steel sheeting.