若规定
,例如
;
,则
=_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4999e3f5b29ae96b9b64aa1edcefc236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1000880ec342a15d8370e8960d8d57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f56d527ab8e469d5e9d0f1774ece5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7369babdbf1463046890364def6d9d73.png)
更新时间:2019-11-07 15:23:26
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【知识点】 有理数加减混合运算的应用
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【推荐1】如图的号码是由12位数字组成的,每一位数字写在下面的方格中,若任何相邻的三个数字之和都等于12,则x的值为________ .
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【推荐2】电子青蛙落在数轴上的某一点
,第一步从
向左跳
个单位到
,第二步由
向右跳
个单位到
,第三步由
向左跳
个单位到
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步时,电子青蛙落在数轴上的点是
,则电子青蛙的初始位置
点所表示的数是________ .
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