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同学们还记得吗?我们在学习方程时总是把方程和“天平”联系起来,天平的两端就可以看成是方程的左右两边.当天平左右两端相等时,天平平衡,得到等式.同学们有没有想过:当天平两端不相等时,天平还平衡吗?现实生活中存在大量的数量关系,有相等的,有不等的,相等关系我们可以用“=”表示,不等关系用什么符号表示呢?为了寻找表示不等关系的符号,多少年来,数学家们绞尽了脑汁.首先法国的
Do students still remember that when we study equations, we always associate equations with “balance ”, the two ends of the balance can be regarded as the left and right sides of the equation, and when the balance is equal at both ends, the balance is balanced Equations Have students ever thought: When the balance is not equal at both ends, the balance also balance? There are a large number of real-life relations, there are equal, unequal, equal relationship we can use "Said that the relationship between what symbols to express it? In order to find signs of unequal relations, for many years, mathematicians racked their brains .First France