下
列各式中,化简正确的是( )
![](https://img.xkw.com/dksih/QBM/2018/11/30/2086466709774336/2089744494321664/STEM/767559f2e12547879c6894c414e70fca.png?resizew=5)
A.﹣(+7)=﹣7 | B.﹣(﹣7)=﹣7 |
C.+(﹣7)=7 | D.﹣[+(﹣7)]=﹣7 |
16-17七年级上·全国·课后作业 查看更多[7]
更新时间:2018-12-04 21:38:58
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