江苏省南京市联合体2018年中考数学第一次模拟试题(含答案)(2)

来源：网络收集时间：2026-09-07

导读：解②，得x ≤32 ． 4分 ∴不等式组的解集为－1＜x ≤32 ． 6分 18．（本题7分）解：? ????a －1 a －1 － 1 a －1 a －1(a ＋2)( a －2) 3分＝ a －2 a －1 a －1(a ＋2)( a －2) 4分＝1a ＋2 ． 5分当a ＝－3

解②，得x ≤32

． ······················································································· 4分 ∴不等式组的解集为－1＜x ≤32

． ································································· 6分 18．（本题7分）

解：?

????a －1 a －1 － 1 a －1 ·a －1(a ＋2)( a －2) 3分＝

a －2 a －1 ·a －1(a ＋2)( a －2) 4分＝1a ＋2

． ···························································································· 5分当a ＝－3时，原式=－1 ········································································ 7分

19．（本题7分）

解：设原来每天加工x 顶帐篷，根据题意得

1500 x ＝300x ＋12001.5x

＋4 ··················································································· 4分解得x ＝100． ··························································································· 6分经检验：x ＝100是原方程的解．

答：原来每天加工100顶帐篷． ···································································· 7分

20．（本题8分）

江苏省南京市联合体2018年中考数学第一次模拟试题(含答案)(2).doc 将本文的Word文档下载到电脑，方便复制、编辑、收藏和打印

下载这篇word文档

本文链接：https://www.jiaowen.net/wenku/131456.html（转载请注明文章来源）

上一篇：华为统一通信产品整体介绍
下一篇：2010班主任队伍建设规划[1]