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六年制七册四单元求长方形和正方形面积的应用题,包括已知长、宽(或边长)求面积和求组合图形面积两种类型。为让学生较快掌握这部分知识,教师应把握教材的编排特点组织教学。1.引导学生动手操作,在操作中发现和理解面积公式。为便于学生理解、熟记长方形和正方形的面积计算公式,教材安排了例1、例2两个例题。例1的目的在于指导学生实践,让他们自己在实践中发现
Six-year system of seven volumes of four rectangular and square area application questions, including the known length, width (or side length) seeking the area and the combination of graphics area of two types. To enable students to quickly grasp this part of the knowledge, teachers should grasp the characteristics of the textbook organization teaching. 1. To guide students hands-on operation, in the operation to find and understand the area formula. In order to facilitate students to understand, memorize the formula for the area of the rectangle and square, the textbook arranged cases 1 and 2 two examples. The purpose of Example 1 is to guide students to practice so that they find themselves in practice