先化简再求值
,其中
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c624f396a6e99df00e59f8d30a1e38e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f3fa679bb55ded25a9b72a8e788cb1.png)
更新时间:2022-03-09 08:09:53
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解答题-计算题
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名校
【推荐1】计算下列各题:
(1)
;
(2)
;
(3)
.
(4)先化简,再求值:
,其中
,
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82858d24dca9c683d89d95c541d79037.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b934a5f5606ae2aec3893d5cd7d740fc.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdc36c0e6c19b46b7a5df8c9c94136e.png)
(4)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7dd939deddd44b017d6f1ca44db3fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c98a7f3a8bf384b1dfc1d34aebd46d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
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【推荐2】先化简,再求值
已知(x﹣2)2+|y+1|=0,求5xy2﹣[2x2y﹣(2x2y﹣3xy2)].
已知(x﹣2)2+|y+1|=0,求5xy2﹣[2x2y﹣(2x2y﹣3xy2)].
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解答题-问答题
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【推荐1】为加强疫情防控,某学校准备购进一批消毒湿巾.甲、乙两个药房出售这种消毒湿巾的价格均为8元/盒,在出售的过程中又有不同的优惠方案:在甲药房购买消毒湿巾,不超过100盒不打折,超过100盒的部分打九折;在乙药房购买消毒湿巾,不超过200盒不打折,超过200盒的部分打八折.
(1)学校在甲药房购买120盒消毒湿巾,实际应花费______元;
(2)学校计划购入
盒消毒湿巾,分别写出在甲、乙两个药房采购时,实际应花费多少元(用含有
的式子表示);
(3)当学校购入多少盒消毒湿巾时,在两家药房的实际花费相同.
(1)学校在甲药房购买120盒消毒湿巾,实际应花费______元;
(2)学校计划购入
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)当学校购入多少盒消毒湿巾时,在两家药房的实际花费相同.
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解答题-计算题
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适中
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【推荐2】计算:
(1)(-3)0+
+(-2)3;
(2)(-2a3)2·3a3+6a12÷(-2a3) ;
(3)(x+1)(x﹣2)﹣(x﹣2)2 .
(1)(-3)0+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d865d98e6072fc284fe68b7036e86d79.png)
(2)(-2a3)2·3a3+6a12÷(-2a3) ;
(3)(x+1)(x﹣2)﹣(x﹣2)2 .
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【推荐1】(1)
;
(2)x3•(2x3)4÷(﹣x4)3.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bef902b27e7c7266bf221953fd5c044.png)
(2)x3•(2x3)4÷(﹣x4)3.
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【推荐2】计算
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68628fe1398bf760cf93101489007163.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754ebbca9d9baa5f2ff70ab74ffcf6ff.png)
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec34da1c4cdb35a4437b65fd09216f3.png)
(4)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a2278929f434fa34a20767cce73115.png)
(5)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75c8ad014097ded160567887bb1ef720.png)
(6)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b9fe4e738baab58effa8fbc1437a092.png)
(7)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dbc72fd253e4c8ba134cca8c989e19e.png)
(8)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68628fe1398bf760cf93101489007163.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754ebbca9d9baa5f2ff70ab74ffcf6ff.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec34da1c4cdb35a4437b65fd09216f3.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a2278929f434fa34a20767cce73115.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75c8ad014097ded160567887bb1ef720.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b9fe4e738baab58effa8fbc1437a092.png)
(7)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dbc72fd253e4c8ba134cca8c989e19e.png)
(8)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91371ded9eef94282c9f398ecad512aa.png)
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