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随着新课程标准的不断推进,有效课堂练习的数学问题的表达形式不断发生变化,今天我们一起来看看有关二元一次方程组应用题的几种有效课堂的新型表达形式.一、通过图形来表达信息例1图中的足球是由32块黑白相间的牛皮缝制而成的,黑皮可以看成是各边相等的五边形,白皮可看作是各边相等的六边形.求黑皮和白皮的块数.分析:从图中我们可以看出黑
With the continuous advancement of the new curriculum standards, the expression of the mathematical problems in effective classroom exercises is continuously changing. Today, let’s take a look at the new expressions of several effective classrooms on the application of binary equations. First, To express information Example 1 The figure in the picture is made of 32 white and black leather sewn, black leather can be seen as each side of the pentagon equal, white leather can be seen as the same side of the hexagon Find the number of black and white skin. Analysis: From the figure we can see the black