选择数学工具

策略性地选择并运用合适的工具和表征方式：根据问题需求，在心算、正式书面计算、代数方法、坐标网格和技术工具之间做出恰当选择。

Select and use tools and representations strategically: choose between mental methods, formal written methods, algebraic approaches, coordinate grids, and technology based on the demands of the problem

学习证据 / Evidence

• 解释为什么对于 4,752 ÷ 13，长除法比心算更合适
• 选择用坐标网格来验证平移，而不是仅凭描述进行推算
• 选择基于公式的方法，而不是逐个数小立方体来高效求出体积

• Explain why long division is more appropriate than mental methods for 4,752 ÷ 13
• Choose a coordinate grid approach to verify a translation rather than computing from a description alone
• Select a formula-based approach rather than counting cubes to find volume efficiently

评估问题 / Assessment

当 {{name}} 决定如何解决一个数学问题时，是否会选择最有效的方法——用代数处理复杂的一般化问题，用坐标网格处理几何问题，或用口算处理简单计算？

When {{name}} chooses how to tackle a maths problem, do they pick the most efficient approach — using algebra for a complex generalisation, a coordinate grid for a geometry problem, or mental arithmetic for a simple calculation?