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关于“长方形、正方形的面积计算”教学会有这样的争论:有的人认为长方形的面积计算公式可以通过推导得出:长几表示长边可以放几个面积单位,宽几可以表示宽边可以放几个面积单位,最后通过乘法计算出面积。通过教学要让学生明白为什么长乘宽等于长方形的面积。也有另一拨人认为长方形的面积公式怎么可能在小学被推导出
On the “rectangular, square area calculation ” teaching there will be such controversy: Some people think that the formula for calculating the area of rectangular can be derived: a few long means that the long side can put a few area units, the width can be expressed a few wide Edge can put a few area units, and finally calculated by multiplication area. Through teaching let students understand why the length of a long rectangle equal to the area. There are also other people who think that the area formula of a rectangle can be deduced in elementary school