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4个10怎么算等于7

更新时间: 2021-03-08 14:14:10     

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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