定义一种新运算“
”:
,比如:
.
(1)求
的值;
(2)若
,
,比较A与B的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3c2f679d53b91088ba6eb14c16cbc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e0774a0646e5549aba86e4f00e82d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d71eb1d4eae657bf48e4331fbfc0ee.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2139d3d37fcc51cdafb9903a6040b8d4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0bc70959ab7a9336e0f8bf5f4e64fde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3265a977eca8bc9c77737cb38f0b1898.png)
23-24七年级上·河南商丘·期中 查看更多[3]
河南省商丘市民权县2023-2024学年七年级上学期期中数学试题江西省新余市渝水区新溪中学2023-2024学年七年级上学期期中数学试题(已下线)清单05 整式化简求值的十大经典题型 (10种题型解读(45题))-2023-2024学年七年级数学上学期期末考点大串讲(苏科版)
更新时间:2023-11-28 08:43:13
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【推荐1】计算
(1)12﹣(﹣18)+(﹣6) (2) (﹣5)×2 +15÷(﹣3)
(3)
(4)(
)×(-12);
(1)12﹣(﹣18)+(﹣6) (2) (﹣5)×2 +15÷(﹣3)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a941fdb990b60546b57f6c371e8b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7949c8c75eb25054b1c3a97c505a37.png)
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解答题-作图题
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【推荐2】一辆货车从货场
出发,向东走了
千米到达批发部
,继续向东走
千米到达商场
,又向西走了
千米到达超市
,最后回到货场 .
(1)用一个单位长度表示
千米,以东为正方向,以货场为原点,画出数轴并在数轴上标明货场
,批发部
,商场
,超市
的位置;
(2)超市
在货场
什么方向?距货场
多远?
(3)若货车行驶一千米耗油
升,那么货车在整个行驶过程中共耗油多少升?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8f58755aee89fb2cf72ba518dcee2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9be62bd344030a88397561cb7814e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/150b5ef3-e167-4663-b3cc-5fb2ff0d4e01.png?resizew=372)
(1)用一个单位长度表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)超市
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(3)若货车行驶一千米耗油
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7412fd1be21e4eaf388963a82ac2b11.png)
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【推荐1】在有理数范围内,我们定义三个数之间的新运算法则“
”;
;如:
.解答下列问题:
(1)计算:
的值;
(2)计算:
的值;
(3)在
,
,
,0,
,
,
,1这8个数中,任意取三个数作为a,b,c的值,进行“
”运算,求在所有计算的结果中的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3c2f679d53b91088ba6eb14c16cbc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65dad2c0bc8859b9755127ddeba3487c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26b006895940cedf45834372dd8d5ec3.png)
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add32a0501a9d8d7c319c7632488c7d4.png)
(2)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbb79dab19551288d8e1e17acf305a3.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf50621711f3601b3f90a29502a28c56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9237f95cb63d2e280e2ce8a4c5797255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/774c85da5ff2a7e458f60235255cf34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6c7567972273b4ba733b47bf9d5408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e9b14363d4944ecb31eb03d554629c7.png)
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【推荐2】阅读理解:整体代换是一种重要的数学思想方法.例如:计算
时,可将(2m+n)看成一个整体,合并同类项得
,再利用分配律去括号得
.
(1)若已知
,请你利用整体代换思想求代数式
的值;
(2)某同学做一道题,已知两个多项式A、B,求
的值.他误将“
”看成“
”,经过正确计算得到的结果是
.已知:
,请你帮助这位同学求出
正确的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc9b89cc4b04a4c49677b65fbc3bac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9e214626dbdf0f4760d0cef0eb82eda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9a619d34ba7be6b4845fc611b21a56.png)
(1)若已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0e0ec9615bb7d124695d781582b4e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0133ed26b7426bb6272f544283b4b0.png)
(2)某同学做一道题,已知两个多项式A、B,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9e460c144f7a2141d2df0308b125f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9e460c144f7a2141d2df0308b125f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce69cd33d105ce280170f0cd0513026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0db0fe02761770abfa3c302b47f9894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c04111f8df595fd25756d5bc255d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cedf36d24ea4f9063259ea2018baae38.png)
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