在有些情况下,不需要计算出结果也能把绝对值符号去掉.例如:
|6+7|=6+7;|6-7|=7-6;|7-6|=7-6;|-6-7|=6+7;
根据上面的规律,把下列各式写成去掉绝对值符号的形式:
(1)|7-21|=_________;
(2)|-
+0.8|=____________;
(3)|
|=__________;
(4)用合理的方法计算:|
|+|
|-|-
|-
×|-
|+
.
|6+7|=6+7;|6-7|=7-6;|7-6|=7-6;|-6-7|=6+7;
根据上面的规律,把下列各式写成去掉绝对值符号的形式:
(1)|7-21|=_________;
(2)|-
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(3)|
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa553a383381f27c0ccfbf72fa1e3ad.png)
(4)用合理的方法计算:|
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/628200334fd43247057a14a7901004b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc2db40326017f94e92fdcd323e7101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d97e11b24e0372263d656b26bb5469.png)
更新时间:2018-11-06 20:10:36
|