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85问答库 > 3⼀10×（5⼀7-10⼀21）（列式计算）

3⼀10×（5⼀7-10⼀21）（列式计算）

2024-12-02 03:33:15

推荐回答（5个）

回答1：

解：原式=3/10*5/7-3/10*10/21
=3/14-1/7
=3/14-2/14
=1/14

回答2：

3／10x（5／7-10/21）的计算方法是：
3/10*（5/7-10/21）
=3/10*5/7-3/10*10/21
=3/14-1/7
=3/14-2/14
=1/14
这就是这道题的计算方法，计算结果等于1／14。

回答3：

回答4：

回答5：

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