某中学为提高中学生身体素质,积极倡导“阳光体育”运动,其中一个运动项目为“一分钟跳绳”,七年级某班10名参赛代表成绩以160次为标准,超出的次数记为正数,不足的次数记为负数,成绩记录如下(单位:次);
,
,
,
,
,
,
,
,
,
.
(1)求该班参赛代表最好的成绩与最差成绩相差多少?
(2)求该班参赛代表一分钟平均每人跳绳多少次?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78db1d592a3d4505f7328586a50dfa29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4b711d4895aaa0102f872b1d4f543d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495c570fa22a16b392183810061eeb40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b9a5f1362c12e1ea8f6fc0d9d787ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497f79b82f7428fd4ad48fb472b2ef13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6489852d310f01375f213b3bdf0406c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e131f0f85c718feadb1d21dad962ea.png)
(1)求该班参赛代表最好的成绩与最差成绩相差多少?
(2)求该班参赛代表一分钟平均每人跳绳多少次?
更新时间:2023-11-15 08:27:06
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【知识点】 有理数加减混合运算的应用
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