'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 有理数的运算 1.有理数的加法: 加法一般步骤: ①确定符号:同号取相同的符号。 异号取...

'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 混合运算顺序 ①三级(乘方)二级(乘除)一级(加减); ②同一级运算应从左到右进行; ③有括...

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'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 互为倒数 乘积为1的两个数互为倒数； 注意：0没有倒数；若a0，那么的倒数是； 倒数是...

'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 乘方的定义 （1）求相同因式积的运算，叫做乘方； （2）乘方中，相同的因式叫做底数...

'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 方程思想 【考点】有理数计算、分数拆分、方程思想【难度】★★★★ 解答题：有8个...

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'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); .绝对值 (1)正数的绝对值是其本身，0的绝对值是0，负数的绝对值是它的相反数；注意：...