论文部分内容阅读
一、理解方程意义的训练理解方程的意义是列方程解应用题的前提,为此我们可设计专项练习。如下列的式子中哪些是方程,哪些不是方程?为什么?①20+5=25(等式)②3x+4(代数式)③S=a×h(公式)④3x-5<4(不等式)⑤3x+5=8(方程)。通过这样的训练。加强了学生对方程意义的理解。方程必须具备两个条件:
First, understand the significance of the training equation Significance of the equation to understand is the prerequisite for the application of column equations solution, for which we can design special exercises. Which of the following equations is an equation and which are not equations? Why? 1 20 + 5 = 25 (Equation)? 3x + 4 (Algebra)? S = a? H? Equation 3? -5? 4? Inequality? = 8 (equation). Through such training. Enhance students' understanding of the meaning of equations. The equation must have two conditions: