七年级数学上册第二章有理数2.2数轴作业(新版)华东师大版.doc

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12.2 数轴一、选择题1图中所画的数轴,正确的是()2在数轴上,原点及原点左边的点所表示的数是()A正数 B负数 C非负数 D非正数3与原点距离是 25 个单位长度的点所表示的有理数是()A25 B-25 C25 D无法确定4关于 这个数在数轴上点的位置的描述,正确的是()32A在-3 的左边 B在 3 的右边 C在原点与-1 之间 D在-1 的左边5一个点从数轴的原点开始,先向左移动 3 个单位长度,再向右移动 6 个单位长度,这个点最终所对应的数是()A+6 B-3 C+3 D-9二、填空题1数轴的三要素是_2数轴上表示的两个数,_边的数总比_边的数大3在数轴上表示数 6 的点在原点_侧,到原点的距离是_个单位长度,表示数-8 的点在原点的_侧,到原点的距离是_个单位长度表示数 6 的点到表示数-8 的点的距离是_个单位长度参考答案:一、1D 2D 3C 4D 5C 二、1原点、正方向和单位长度 2右左 3右 6 左 8 14

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