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同学们学习不等式时,可对比等式来学习,想一想,不等式与等式有哪些不同点?一、不等式的概念和意义因为表示不等关系的式子叫作不等式,所以不等式中必定含有表示不等关系的符号.用不等式表示数量关系的关键是要认真领会语句中内在的数量关系,并选择合适的不等号来表示数量的不等关系.如非负数即大于或等于0的数,不大于即小于或等于,“至少”是“不少于”的意思,即大于或等于.
Students learn inequality, you can compare the equation to learn, think about it, inequality and equation What are the differences? First, the concept and meaning of inequality Because the expression of inequality is called inequality, inequality must contain The symbol that shows unequal relations The key to expressing the quantitative relationship by inequality is to comprehend the inherent quantitative relations in sentences and choose the appropriate inequalities to represent the unequal relations of numbers.If the number of nonnegative numbers is greater than or equal to 0, Greater than or equal to less than or equal to, “at least” means “not less than”, ie greater than or equal to.