论文部分内容阅读
人教版教科书《数学》七年级上册,“一元一次方程”一章前两节的编排顺序为:通过具体实例列出方程,给出方程的概念;含有未知数的等式——方程.接下来给出一元一次方程的概念和方程的解的概念.接下来通过天平得出了等式的性质1:等式两边加(或减)同一个数(或式子),结果仍相等.如果a=b,那么a±c=____.再次操作天平得出等式的性质2:等式两边同乘一个数,或除以同一个不为0的数,结果仍相
People’s Education Edition textbook “Mathematics” on the seventh grade, “first order equation ” a chapter the first two sections of the arrangement order: list the equation through specific examples, give the concept of equations; equation with unknown equations - equation. Next, we give the notion of the solution of the concept of a unitary equation and the solution of the equation. Then we get the property of the equation 1 by adding (or subtracting) the same number (or formula) to both sides of the equation, and the results are still equal. If a = b, then a ± c = ____. To operate the balance again, obtain the property of the equation 2: By multiplying both sides of the equation by a single number, or dividing by the same non-zero number, the result is still negative