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列方程组解决实际问题就是把“未知”转化成“己知”的重要方法。它的关键是把未知量和己知量联系起来,根据题目中的相等关系列方程(组),所列方程必须满足:(1)方程两边表示的是同类量;(2)同类量的单位要统一;(3)方程两边的数值要相等。“数学来源于生活,又应用于生活”重在“学以致
Column equations to solve the actual problem is to ”unknown“ into ”known “ important method. The key point of this method is to link the unknowns to the known ones. According to the Equations in Equations (Equations of Equations) in the title, the equations listed must satisfy: (1) Equations of the same kind are represented on both sides of the equation; (2) Units of the same kind Unified; (3) the values on both sides of the equation should be equal. ”Mathematics comes from life, but also applied to life “ emphasis on ”learning to cause