小明做这样一道题:“计算:
”,其中“■”是被墨水污染看不清的一个数,他翻开后面的答案知该题计算的结果等于9,那么“■”表示的数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36fff2677a248059cf28023cd1f7f871.png)
A.5 | B.![]() | C.![]() | D.5或13 |
更新时间:2023-02-05 09:16:06
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单选题
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较易
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【推荐2】有理数
、
、
在数轴上的对应点如图所示,则
=( )
![](https://img.xkw.com/dksih/QBM/2020/9/29/2560081602256896/2564670266556417/STEM/2156f87605534770b2f786b5ed3ae6d8.png?resizew=268)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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![](https://img.xkw.com/dksih/QBM/2020/9/29/2560081602256896/2564670266556417/STEM/2156f87605534770b2f786b5ed3ae6d8.png?resizew=268)
A.![]() | B.-a+b-c | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐1】a,b两数在数轴上的位置如下图所示,则下列各式:①ab>0;②a+b>0;③a-b>0;④
;⑤
;正确的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/c1e55516-abd7-412f-97b5-c94ca5d62f17.png?resizew=196)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35112f17924afc79c0d0765ee518a0cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc1e5814684904a9aca03678acf0ad5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/c1e55516-abd7-412f-97b5-c94ca5d62f17.png?resizew=196)
A.2 | B.3 | C.4 | D.5 |
您最近一年使用:0次