Summary: | In teaching of History at the school, for the temporary location of the fats that are studied, is used a straight representation: a straight line o r half straight line (number ray). Such representation is part of the content of the subject Mathematics. which since earlier grades the students recieve. The article remarks two facts: first the cross di sciplinary relationship that is seen between these two subjects through this aspect of the content in both though with different approaches taking into consideration didactics; and second how to support and complement each other, just to mention the Mathem atics Leading Program.
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