直接写出答案:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f56236a8518a7e67cf0d7639973b3bdc.png)
__________
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e57249f9e109a1adaf411e57387bca0.png)
____________
③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f4a9a59219b51fc703ca0f07f536bf.png)
__________________
④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e81460561794b0b3c8b604490ff5eef.png)
______________
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f56236a8518a7e67cf0d7639973b3bdc.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e57249f9e109a1adaf411e57387bca0.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f4a9a59219b51fc703ca0f07f536bf.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e81460561794b0b3c8b604490ff5eef.png)
更新时间:2019-12-03 09:56:51
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【推荐2】有理数a、b、c的位置如图所示,化简式子:
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【推荐2】如图是一块长方形
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