计算:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef879ef6f2388a37feece276b6afa165.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b09eaa1ef9c2d06a471c3438c56b28.png)
更新时间:2024-02-27 07:52:21
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解答题-问答题
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较易
(0.85)
【推荐2】小明有
张写着不同数字的卡片,请你按要求选择卡片,完成下列问题:
![](https://img.xkw.com/dksih/QBM/2018/2/28/1891972878655488/1896292534083584/STEM/117695ab79e14d129429a2212faa90a3.png?resizew=407)
(1)从中选择两张卡片,使这两张卡片上数字的乘积最大;
(2)从中选择两张卡片,使这两张卡片上数字相除的商最小;
(3)从中选择
张卡片,每张卡片上数字只能用一次,选择加、减、乘、除中的适当方未能(可加括号),使其运算结果为
,写出运算式子.(写出一种即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bff990c7925edc33ee124c18f0e3ddb.png)
![](https://img.xkw.com/dksih/QBM/2018/2/28/1891972878655488/1896292534083584/STEM/117695ab79e14d129429a2212faa90a3.png?resizew=407)
(1)从中选择两张卡片,使这两张卡片上数字的乘积最大;
(2)从中选择两张卡片,使这两张卡片上数字相除的商最小;
(3)从中选择
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87d696d9bf311bddb74b915fb3e9506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a950cfbee3bbdf00a2d1ed1aa5f2021d.png)
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