Directed Numbers Addition and Subtraction (with Brackets)

This example demonstrates the calculation and visualization process of addition and subtraction of directed numbers (positive and negative) with brackets. It involves core math concepts like rules for operations with signed numbers, handling parentheses, and number line representation. The construction utilizes GeoGebra commands/objects such as If conditional, Vector, signMiddle for sign determination, variables m_1, m_2, control buttons (button), and text elements. It is suitable for middle school mathematics teaching, helping students understand the rules of signed number operations and the impact of parentheses.