A、B分别为数轴上的两点,A点对应的数为-10,B点对应的数为40.
(1)请写出A、B两点之间的距离为 ;
(2)请写出与A,B两点距离相等的M点对应的数为 ;
(3)若当电子蚂蚁P从B点出发时,以3个单位/秒的速度向左运动,同时另一只电子蚂蚁Q恰好从A点出发,以2个单位/秒的速度向右运动,经过多长的时间两只电子蚂蚁在数轴上相距20个单位长度?
(1)请写出A、B两点之间的距离为 ;
(2)请写出与A,B两点距离相等的M点对应的数为 ;
(3)若当电子蚂蚁P从B点出发时,以3个单位/秒的速度向左运动,同时另一只电子蚂蚁Q恰好从A点出发,以2个单位/秒的速度向右运动,经过多长的时间两只电子蚂蚁在数轴上相距20个单位长度?
更新时间:2016-12-06 04:14:05
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【知识点】 几何问题(一元一次方程的应用)解读
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【推荐1】如图所示是用铁丝围成的一个梯形,将其改成一个长和宽之比为2:1的长方形,求该长方形的面积.
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解答题-问答题
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【推荐2】如图1,数轴上点
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(1)若点
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为点
和点
的“
级精致点”,则
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(2)若点
是数轴上点
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(3)如图2,数轴上点
和点
分别表示的数是
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级精致点”,且满足
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(1)若点
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