体积的可加性

理解体积的可加性；会计算由两个或多个不重叠长方体组成的组合体的体积。

Recognise volume as additive; find volumes of composite solid figures made of two or more non-overlapping right rectangular prisms

学习证据 / Evidence

• 将一个L形立体分解为两个长方体，并计算总体积。
• 解决一个需要计算组合体体积的现实问题（例如台阶形结构）。
• 解释为什么将组合体分割成长方体后就能计算总体积。

• Decompose an L-shaped solid into two cuboids and calculate total volume
• Solve a real-world problem requiring the volume of a composite figure (e.g. a step-shaped structure)
• Explain why splitting a composite solid into rectangular prisms allows calculation of total volume

评估问题 / Assessment

如果一个L形游泳池由两个长方体部分组成，{{name}}能不能分别求出每部分的体积，再把它们相加得到游泳池的总体积？

If an L-shaped swimming pool is made of two rectangular sections, can {{name}} find the volume of each section separately and add them to get the total volume of the pool?