《分式》可以说是讲的最少练的最多的一章。分式的计算化简完全可以类比分数进行,分式方程的教学又可以用转化的思想化归到一元一次方程。通过类比与转化,很多知识学生自然就通了,但因分式相比较分数有字母参与,分式的化简计算都相对较为繁杂,一点出错,那是前功尽弃、全盘皆输。所以理清脉络、算理清晰是学生必须具备的。 “Fractional” can be said to be at least the most practiced chapter. Fractional simplification of the calculation can be completely analogical scores, the teaching of fractional equations can be transformed into a one-dimensional equation of thinking. Through analogy and conversion, many students of knowledge naturally pass, but because fractional fractional scores have letters involved, fractional reduction calculations are relatively complex, a little error, that is to come to naught, all lose. So clear the context, clear-cut students must have.