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同学们升入初中以后首先学习的数学内容是有理数.有理数是什么样的数?怎样进行有理数的运算?这两个问题弄明白了,有理数的核心内容就抓住了.恩格斯说:“数学的对象是客观世界的空间形式和数量关系.”简单地说,数学是研究“形”和“数”的科学.同学们小学学过的知识中,直线、三角形、四边形和圆等内容都属于“形”的范畴,整数、分数和小数等内容都属于“数”的范畴.
The students who first entered junior high school after learning the mathematical content is a rational number. What is the rational number? How to carry out the operation of rational numbers? These two problems understand, the rational content of the core content to seize .Engels said: “Mathematics The object is the spatial form and quantity of the objective world. ”“ Put simply, mathematics is the science that studies the ”shape“ and the ”number.“ Of the knowledge that students have learned in elementary school, lines, triangles, quadrilaterals, Circles and other content belong to the category of ”shape “, integers, fractions and decimals belong to ”number " category.