Graphical Demonstration of Integer Addition and Subtraction

This GeoGebra applet provides a graphical demonstration of adding and subtracting integers using geometric constructions on the coordinate plane. It illustrates core mathematical concepts such as integer arithmetic, positive and negative direction, vector translation, and the geometric meaning of signs. The construction employs GeoGebra commands including Line, Vector, OrthogonalLine, Intersect, Segment, Mirror, Midpoint, and the conditional command If, together with points A, B, C, E, F, G, H, segments d, e, f, g, h, u, v, w, and multiple text objects (texto, TextoSigno series) to dynamically display operation symbols and results. Suitable for middle school mathematics instruction, classroom demonstrations, and independent student exploration, helping learners build geometric intuition for integer addition and subtraction.