初中数学 第一章 有理数 ................................................................................................................................. 5 1 .1 正数和负数 ...................................................................................................................... 5 1 .2 数轴 .................................................................................................................................... 5 1 .3 有理数的大小 .................................................................................................................... 5 1 .4 有理数的加减 ..................................................................................................................... 5 1 .5 有理数的乘除 ..................................................................................................................... 5 1 .6 有理数的乘方 ..................................................................................................................... 5 1 .7 近视数 ................................................................................................................................. 6 第二章 整式加减 ............................................................................................................................. 6 2 .1 用字母表示数 ..................................................................................................................... 6 2 .2 代数式 ................................................................................................................................. 6 2 .3 整式加减 ............................................................................................................................. 6 第三章 一次方程与方程组 ............................................................................................................. 6 3 .1 一元一次方程及其解法 ........................................................................
