已知a,b互为相反数,c,d互为倒数,|x﹣1|=2,求
+(a+b)x﹣|x|的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fb58b9be2b9afbe4d4bd480af95164.png)
更新时间:2018-08-10 22:17:05
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【推荐1】根据题意解下列问题
(1)已知a,b互为相反数,c,d互为倒数,x的绝对值是4,求
的值.
(2)定义一种新运算:
.
①求
的值;
②求
的值.
(1)已知a,b互为相反数,c,d互为倒数,x的绝对值是4,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1623b2c6b8fec49f4882c3812c2620.png)
(2)定义一种新运算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1303118703d9096fa7928bcc023c944.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b67fe9a1bb43a28b6e49ec0717d0e61f.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf43d122cd365a40b2bea690d6ff6e8.png)
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名校
【推荐2】若a与b互为相反数,c与d互为倒数,x的绝对值为2,y的平方等于4,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f81ddf7bde783f268af3da5467ec5c43.png)
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【推荐1】测量一幢楼的高度,七次测得的数据分别是:79.8m,80.6m,80.4m,79.1m,80.3m,79.3m,80.5m.
(1)以80为标准,用正数表示超出部分,用负数表示不足部分,写出七次测得数据对应的数;
(2)求这七次测量的平均值;
(3)写出最接近平均值的测量数据,并说明理由.
(1)以80为标准,用正数表示超出部分,用负数表示不足部分,写出七次测得数据对应的数;
(2)求这七次测量的平均值;
(3)写出最接近平均值的测量数据,并说明理由.
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【推荐1】已知:
互为相反数
的倒数是
是最小的正整数.
(1)填空:
__________;
(2)求
的值;
(3)比较
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18825fd69ad0195422c2392c52df950b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0580ee6b56447090d14ed0f57286414.png)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1817297374e431a1d9087dcc2991d3a9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba90dfa498114b08f0ad0f8cccb3fcd.png)
(3)比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde0569104075c2b671e536085336082.png)
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【推荐2】若a,b互为相反数,c,d互为倒数,m的绝对值为2.
(1)
________,
_______,
________.
(2)求
的值.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892560dcff6af9f66a3f735652f69dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f56c7629163c5fe76b2c5990d7ac1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2ec5719f2a282a6f939d7778107a7d.png)
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解答题-计算题
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【推荐1】(1)先化简,再求值:
,其中
,
;
(2)定义一种新运算“
”,其规则为
.例如
,
.
①计算
值为_____________;
②有理数的加法和乘法运算都满足交换律,即
,
,那么“
”运算是否满足交换律?若满足,请说明理由;若不满足,请举例说明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5dec73dad460f2930f75801f131c670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
(2)定义一种新运算“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7477c2b32e6d47dcd372102703a044c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d449dcac158d71519cbca2b9713ac6d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de75224523a2cfdf0a451a9622832675.png)
①计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f41499f005bfc6013b5949768feb05c.png)
②有理数的加法和乘法运算都满足交换律,即
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c66ebcce45b0de24a80f1892d5fc3b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2ca1e93f07daa6498b39beb12d2aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
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【推荐2】请观察下列算式,找出规律并填空
=1-
,
=
-
,
=
-
,
=
-![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
则第10个算式是 = 第n个算式是 =
根据以上规律解答下题:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e375f9e56c70f61cf17e9ce7d6599cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231fd0fbb933002c6a527dcc4f7186f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4a646b098601ebe77beadf1707deca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc577290d0e6ac8d874419ff015a42dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
则第10个算式是 = 第n个算式是 =
根据以上规律解答下题:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89b1fe3452e40f396644178cf67586f.png)
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