一般地,等式有以下两条性质: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.等式的性质2等式两边乘同一个数,或除以同一个不为0的数,结果仍相等.等式的两条性质是等式和方程变形的重要依据,同学们只有深刻理解,熟练掌握,才能灵活运用.为了帮助同学们学好这部分内容.建议同学们在学习等式的性质时注意以下五个问题:一、注意对“两边”和“同一个”的理解以等式的性质2为例:等式的两边要乘(或除以)一个数(除数不能为0)时,左边和右边必须都乘(或除以) In general, equations have the following two properties: Equations (1) The equation (2) adds (or subtracts) the same number (or type) to both sides and produces the same result. Property of Equation 2 The equation is multiplied by the same number, Or divided by the same number is not 0, the result is still equal.Equation of the two properties of equation and equation deformation is an important basis, students only a deep understanding, proficiency in order to be flexible use.In order to help students learn this Part of the content.It is suggested that students pay attention to the following five questions when learning the nature of the equation: First, pay attention to the understanding of “two sides ” and “one and the same ” as an example of the nature of the equation 2: both sides of the equation To multiply (or divide by) a number (the divisor can not be 0), both the left and right must be multiplied (or divided by)