2018年郴州市中考数学模拟试题答案

发布时间:2022-12-03 20:19:31   来源:文档文库   
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2018年郴州市初中毕业学业考试模拟试卷
数学参考答案及评分标准
说明:
1. 如果考生的解法与本答案的解法不同,可参照本答案的评分意见给分. 2. 评卷中,不要因解答中出现错误而中断对该题的评阅,当解答中某一步出错影响了后继部分,但该步以后的解未改变这道题的内容和难度,在未发生新的错误前,可视影响的程度决定后面部分的记分,但不应超过后面部分应给分数的一半,如有严重错误,就不记分. 3. 各题解答中右端所给分数,表示考生正确做到这步应得的累加分数.
一、选择题(共8小题,每小题3分,共24分)
15 BCADD 68
CBA 二、填空题(共8小题,每小题3分,共24分)
9. 3m(m12 13. 6
10. x1x1 14. 45°
11. (2, 5
15. 12.
16. 7
2
5三、解答题1719题每题6分,2023题每题8分,2425题每题10分,2612分,82分)
17. 解:原式123···································4(每一知识点1分) 231·213231·······························································5
223·············································································2



18. 解:原式46a3·····················································2 a3(a3(a3342·······································································3
a3a342················································································4 a32················································································5 a32·························································6 1·a3

a1时,原式19. 证明:如图,∵ 四边形ABCD是平行四边形, ABDCABDC.………………………… 1 DEAB DEDC
DCE=∠DEC.…………………………3 ABDC
ABC=∠DCE

ABC=∠DEC …………………………4 又∵ ABDEBEEB
ABE≌△DEB …………………………5 AEBD.…………………………6
20. 解:1200·······················································································2 2)图1和图2补充如下:


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