计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85469e755fa4592f4660ce96807d4cd.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85469e755fa4592f4660ce96807d4cd.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ae0277bf02e71ddfe47ab9682dea5c.png)
更新时间:2024-05-07 11:27:26
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解答题-计算题
|
较易
(0.85)
【推荐1】计算下列各式.
(1)﹣19+5﹣(﹣10)+7;
(2)﹣22+(﹣
)3÷(﹣
)×8.
(1)﹣19+5﹣(﹣10)+7;
(2)﹣22+(﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
您最近一年使用:0次
解答题-计算题
|
较易
(0.85)
【推荐2】观察由※组成的图案和算式,解答问题:
![](https://img.xkw.com/dksih/QBM/2022/3/20/2940502705602560/2953060082458624/STEM/ee97ce789d164377ba03f4ac55cf0ce2.png?resizew=125)
①1+3=4=2;
②1+3+5=9=3;
③1+3+5+7=16=4;
④1+3+5+7+9=25=5;
……
(1)请猜想1+3+5+7+…+37+39=____________;
(2)写出第n个算式;
(3)请用上述规律计算:49+51+53+…+107+109的值.
![](https://img.xkw.com/dksih/QBM/2022/3/20/2940502705602560/2953060082458624/STEM/ee97ce789d164377ba03f4ac55cf0ce2.png?resizew=125)
①1+3=4=2;
②1+3+5=9=3;
③1+3+5+7=16=4;
④1+3+5+7+9=25=5;
……
(1)请猜想1+3+5+7+…+37+39=____________;
(2)写出第n个算式;
(3)请用上述规律计算:49+51+53+…+107+109的值.
您最近一年使用:0次
解答题-计算题
|
较易
(0.85)
【推荐1】已知
.
(1)化简
;
(2)若
,
是方程
的两个根,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b25a3e4eea7cd0bb3bde2b2e3a3e153.png)
(1)化简
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08587591cfb5275dc14d5bb66a397e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
您最近一年使用:0次