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在大力提倡素质教育,信息化高度发展的今天,有不少人认为计算已不再重要,数的教学可以放松了,但作为义务教育的基础课程的数学——七年级数学第一章有理数,是紧接小学数学学习的,作为初中阶级数学的基础;从第二章的整式的加减到第三章的解方程以及以后的二元一次方程的求根和函数的有关计算都离不开有理数的运算。有理数中有关定义概念也是以后学习数学的理论基
In vigorously promoting quality education, the highly developed information today, many people think that computing is no longer important, the number of teaching can be relaxed, but as a basic course of compulsory education mathematics - seventh grade mathematics, the first chapter of rational numbers, Is followed by primary school mathematics, as a basis for junior high school mathematics; from the second chapter of the whole addition and subtraction to the third chapter of the equation and the equation of the equation and the root of the calculation of the function can not be separated Rational number of operations. The definition of rational numbers in the concept of mathematical theory is the basis for later learning