2018_2019学年七年级数学上册第二章有理数及其运算2.8有理数的除法课件(新版)北师大版.ppt

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8 有理数的除法,1.两个有理数相除,同号得 ,异号得 ,并把绝对值 .0除以任何非0的数都得 ,不能作除数. 2.计算:(-12)(-4)= ;(-12)4= . 3.除以一个数等于乘这个数的 .,正,负,相除,0,0,3,-3,倒数,-4,1,2,3,4,答案,1.(2017福建龙岩新罗区校级月考)如果 ,那么下列判断正确的是( ). A.a+b0 B.a+b0 D.ab0,1,2,3,4,答案,1,2,3,4,答案,1,2,3,4,答案,4.两个有理数在数轴上对应的点分别在原点的两侧,且到原点的距离相等,则这两个有理数的商是 .,

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