一、教学目标及确立目标的依据知识目标:1.了解解二元一次方程组的消元思想,初步体现数学研究中“化未知为已知”的化归思想,从而“变陌生为熟悉”。2.培养学生的分析能力,能迅速在所给的二元一次方程组中,选择一个系数绝对值较小的方程进行变形。3.训练学生的运算技巧,养成检验的习惯。 First, the teaching objectives and the establishment of goals based on knowledge objectives: 1. To understand the elimination of binary equations of a group of thinking, initially embodies the mathematical research “unknown as known ” of the return to the idea, so “becoming strangers To be familiar with ”. 2. To cultivate students’ analytical ability, they can quickly select an equation with a small coefficient absolute value to be transformed in the given binary binary equation group. 3. Train students’ calculation skills and develop test habits.