计算:
(1)
;
(2)
;
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9bab26a33afb86d5fa526afdf8662d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb5432fec54f4e79191d0a2cc7c908d.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9aae4c0ec1b2df25164dbc20b695cdc.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeee44c52c1ea7e839591478be950265.png)
21-22七年级上·江苏盐城·期中 查看更多[4]
江苏省盐城市滨海县2021-2022学年七年级上学期期中数学试题北京育才学校2022-2023学年七年级上学期期中数学试题(已下线)七年级上学期期中【全真模拟卷01】(测试范围:前三章)-2022-2023学年七年级数学上学期考试满分全攻略(苏科版)(已下线)期中押题预测卷01(考试范围:第1-4章)-2022-2023学年七年级数学上册重难题型全归纳及技巧提升专项精练(苏科版)
更新时间:2022-09-16 07:10:49
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(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8409d6ca0a9c3dafc88f022c19333916.png)
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名校
【推荐1】计算
(1)(﹣13)+(﹣7)﹣(+20)﹣(﹣40)+(+16);
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d615f856ec47ed54ee7602471608b459.png)
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ef21ccc8319fce8ccb7749becafb47.png)
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(1)(﹣13)+(﹣7)﹣(+20)﹣(﹣40)+(+16);
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d615f856ec47ed54ee7602471608b459.png)
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(4)﹣32÷(﹣3)2+3×(﹣2)+|﹣4|.
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【推荐2】计算下列各题,能简算的要简算.
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a016f1e8e8bf6d9409bfe7b967b15cf9.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5b8fd5c17542d57f023a0e849a7c59.png)
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(6)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a016f1e8e8bf6d9409bfe7b967b15cf9.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5b8fd5c17542d57f023a0e849a7c59.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3342f13de343132bbcb567e7b7073262.png)
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解答题-问答题
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适中
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解题方法
【推荐3】先阅读理解下面的例题,再按要求解答下列问题:例题:对于
,这类不等式我们可以进行下面的解题思路分析:由有理数的乘法法则“两数相乘,同号得正”,可得(1)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed55b3c0140a0082fc896c65809a2aa1.png)
从而将陌生的高次不等式化成了学过的一元一次不等式组,分别解两个不等式组即可求得原不等式组的解集,即:解不等式组(1)得
,
解不等式组(2)得
,
所以
的解集为
或
.
请利用上述解题思想解决下面的问题:
(1)请直接写出
的解集.
(2)对于
,请根据有理数的除法法则化为我们学过的不等式(组).
(3)求不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f3ae418c19735617ef5d7f3df8c9e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529a7bcccfacf6c7f28b0e900454111b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed55b3c0140a0082fc896c65809a2aa1.png)
从而将陌生的高次不等式化成了学过的一元一次不等式组,分别解两个不等式组即可求得原不等式组的解集,即:解不等式组(1)得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16688590aa75a979cc269d934f1bf899.png)
解不等式组(2)得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200849ce71f53c0321506e27de437b8d.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f3ae418c19735617ef5d7f3df8c9e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16688590aa75a979cc269d934f1bf899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200849ce71f53c0321506e27de437b8d.png)
请利用上述解题思想解决下面的问题:
(1)请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a07784e8f9064a4e4595ed44c8af5c9.png)
(2)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e743c43ad048f6e1e74640b4ff8d9128.png)
(3)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ce59da1590a869442229df4e8ee595.png)
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