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4个10怎么算等于7

更新时间: 2020-11-08 00:00:00     

解答过程如下:10-lg(10x10x10)=10-lg1000=10-3=7。

混合运算的运算顺序:

1、同级运算时,从左到右依次计算。

2、两级运算时,先算乘除,后算加减。

3、有括号时,先算括号里面的,再算括号外面的。

关键词: 怎么 等于

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