正數(shù)的絕對(duì)值是它本身，負(fù)數(shù)的絕對(duì)值是它的對(duì)立面；0的絕對(duì)值是0，兩個(gè)負(fù)數(shù)，大的絕對(duì)值小,3.加法交換律:ab=ba兩個(gè)數(shù)相加，加數(shù)位置互換，和不變,4.負(fù)數(shù)的奇次方為負(fù)，負(fù)數(shù)的偶次方為正；0的任何正整數(shù)冪都是0,2.絕對(duì)值:絕對(duì)值是指數(shù)軸上對(duì)應(yīng)點(diǎn)到一個(gè)數(shù)的原點(diǎn)的距離,初一數(shù)學(xué)知識(shí)點(diǎn)如下:1。{0}1、初一數(shù)學(xué)知識(shí)點(diǎn)有哪些?初一數(shù)學(xué)知識(shí)點(diǎn)如下:1。數(shù)軸三要素:原點(diǎn)、正方向、單位長(zhǎng)度。2.絕對(duì)值:絕對(duì)值是指數(shù)軸上對(duì)應(yīng)點(diǎn)到一個(gè)數(shù)的原點(diǎn)的距離。正數(shù)的絕對(duì)值是它本身，負(fù)數(shù)的絕對(duì)值是它的對(duì)立面；0的絕對(duì)值是0，兩個(gè)負(fù)...