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建模点1:负数模型教学内容:第一单元负数简要分析:负数是数与代数领域中的一个重要组成部分,以往负数的教学安排在中学阶段。课标对教学负数提出的具体目标是“在熟悉的生活情境中,理解负数的意义,会用负数表示一些日常生活中的问题”。现在安排在本单元主要是考虑到负数在生活中有着广泛的应用,学生在日常生活中已经接触了一些负数,有了初步认识负数的基础。同时也是在学生认识了自然数、分数和小数的基础上初步认识负数,可以进一步丰富学生对数概
Modeling point 1: negative model Teaching content: The first unit of a brief analysis of negative numbers: negative numbers and algebra in the field of an important part of the past negative teaching arrangements in the secondary stage. The specific goal that class curricula imposes on teaching negative is: “In familiar life situations, understanding the meaning of negative numbers will use negative numbers to express some problems in daily life.” Now arranged in this unit is mainly taking into account the negative has a wide range of applications in life, students have been exposed to some negative in their daily lives, with a preliminary understanding of the negative basis. At the same time, it is also a preliminary understanding of negative numbers based on students 'knowledge of natural numbers, fractions and decimals, which can further enrich students'