用简便方法计算.
(1)
;
(2)
;
(3)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13b6c093d56e9a8618c44b34a138d093.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be02d483fea18e5fc9900f794d7da165.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/712384b1bc0a19aab38424d310275325.png)
更新时间:2023-09-22 22:24:26
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相似题推荐
解答题-问答题
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较易
(0.85)
【推荐1】同学们,你们有什么好办法又快又准的算出下面各题的答案?把你的好方法讲一讲! 也当一次小老师!
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7123446720d6cdafce172ea59a3cbf.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7123446720d6cdafce172ea59a3cbf.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e66a5f15c0ebb5fb7815bafaeaf1258d.png)
您最近一年使用:0次
解答题-计算题
|
较易
(0.85)
【推荐2】阅读下题中的计算方法,解决问题.
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a607e0eac798aae984f7f14d90c0601e.png)
解:原式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d68f3dc9a3247eefa1dc7d895619cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca3180819ad4eb0efdd0fd8c88775c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6cbc09b6bdb69fc7bfee9f7f23f0217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ad1de6531059757f9d3721d4650e5a7.png)
上面这种方法叫拆项法.
仿照上面的拆项法可将
拆为_________,
拆为_________.
(2)类比上述计算方法计算:
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a607e0eac798aae984f7f14d90c0601e.png)
解:原式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d68f3dc9a3247eefa1dc7d895619cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca3180819ad4eb0efdd0fd8c88775c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6cbc09b6bdb69fc7bfee9f7f23f0217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ad1de6531059757f9d3721d4650e5a7.png)
上面这种方法叫拆项法.
仿照上面的拆项法可将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efa3bcb097da3bbc7e058d598d7488a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afd89427a664b49522c593baaf4f8c45.png)
(2)类比上述计算方法计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73579a6195163b40c218cf3dcfaf004.png)
您最近一年使用:0次