已知
用关于
的代数式表示
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d07fc29f20a09ef7881859c3da8084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00132ca77375ecbe0db0f84b0f493be3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
更新时间:2020-10-06 13:57:18
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【推荐1】在除法运算中,被除数
余数
商
除数,小明在研究这个算法时,进行了以下操作:
①
.
②由①得到19后,再做
余数为4;
③由①②得,被除数为38,余数为4,
被除数
余数
,
④由①②得,商为3,除数为
,
商
除数
;
⑤根据除法逆运算公式:被除数
余数
商
除数,可得:
;
⑥根据等式性质:
,即![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7dc0014c61fb807474b640b16f8b69.png)
显然小明研究的步骤有误,他第一次错误的步骤是______ .(仅填写每一步骤前的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468403b3eba9e40bfa36f464e927738.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bbf91113a7264e477b5347743d3d8e.png)
②由①得到19后,再做
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa8a851d3297dd41e2e113ebfd1d57.png)
③由①②得,被除数为38,余数为4,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/185a86ac77ff9843d59eb7fd895d7d7a.png)
④由①②得,商为3,除数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d1a9eaf7e6a13e748cd4784ad80a4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468403b3eba9e40bfa36f464e927738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f9fb4211209b1a3b1d30c297922381a.png)
⑤根据除法逆运算公式:被除数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468403b3eba9e40bfa36f464e927738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b923efaec026f00e06cb33eb3c51b270.png)
⑥根据等式性质:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9d056c645e78edf3ba3e829359827c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7dc0014c61fb807474b640b16f8b69.png)
显然小明研究的步骤有误,他第一次错误的步骤是
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