若
,化简下列各式,正确的个数有( )
;
;
;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62299c5aca31f4f1a327ff3ea30a07c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b9ca5a789b587d156f2c78652dba61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46626761215bfb524cef7a2804961bd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8631b27c2d1a5f568d42ca5bf9c131f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62299c5aca31f4f1a327ff3ea30a07c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
19-20八年级上·江苏南通·期末 查看更多[5]
更新时间:2020-02-06 14:34:32
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【推荐1】下列运算正确的是( )
A.1﹣2=1 | B.3×(﹣2)=6 |
C.(a4)2=a6 | D.3×(2y﹣1)=6y﹣3 |
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