Didactic device for the learning of the decimal metric system. (Machine-translation by Google Translate, not legally binding)

摘要

Didactic device for learning the metric system, characterized in that it comprises a game panel in a case that :, can bring together several students and a director panel; in both cases it presents the impression of five houses that house the five fundamental measurements of the decimal metric system, indicating in the door the initial of the corresponding unit, in a window the name of the measure and in an upper position one, two or three skylights indicative of how units increase, ten in ten, one hundred in one hundred and one thousand in a thousand; below the houses there is a ladder-shaped cursor with eight distinctive steps of the multiples and general submultiples, so that by placing the staircase below a house one can ascend to it by the steps, combining the name of the value inscribed in each step and that of the unit indicated in the initial of the door, such as milligram, decalitro; in the container house of the weight units, two intermediate steps have been included, representative of the quintal and ton superior orders. (Machine-translation by Google Translate, not legally binding)