计算:
(1)
;
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7e64125d45cc29879657d013853dfce.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafc2d065c49c83ac49e0608bc356a72.png)
更新时间:2021-08-25 17:10:55
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解答题-计算题
|
较易
(0.85)
【推荐2】我们已学的过的运算律有:加法交换律
,加法结合律
,乘法交换律
,乘法结合律
,乘法分配律
.
化简:
,并说出化简过程中所用到的运算律.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c66ebcce45b0de24a80f1892d5fc3b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b6d9f3a85d75967c3a1ceaeab2d045c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2ca1e93f07daa6498b39beb12d2aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50d2ea6f4c8683fb113bb821652b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/031cf09028c1fd70d531b895054d3bb0.png)
化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbd1aa55b8b2f33a346cb16afdee900.png)
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