DA山西省中考真题

2010年山西省初中毕业学业考试

参考答案及评分标准

数学

11． 3x 12. 8 13.

1460 14.x 5 15. y 16.不公平 17. π 18. 3x13

1 ································································· （4分） 2

三、解答题（本大题共个小8题，共76分） 19．（1）解：原式=3 2 =3 2 1 1 1. ··················································································· （5分）

（2）解：原式=

3x x 1 x x 1 x 1 x 1

··················································· （1分）

2xx 1x 13x2 3x x2 x

= ················································································ （2分）

2x2x2 4x2x x 2 = ······································································· （3分） 2x2x

=x 2. ·················································· （4分） 当x 3时，原式= 3 2 1. ········ （5分）

20.解：（1）将图3补充完整得3分（画出虚线不扣分）. （2）图略.答案不唯一，只要符合题目要求均得3分. （第20题答案 图3） 21.解：（1）210÷35%=600（辆）.

答：该店第一季度售出这种品牌的电动自行车共600辆. ····································· （2分） （2）补全条形统计图（没画虚线不扣分）. ···························································· （4分） 补全扇形统计图. ···········································································

··················· （8分）

（3）1800×30%=540（辆）. 答：C型电动自行车应订购540辆. ············································································ （10分）

C

B 35% A

（第21题 图1）

（第21题 图2）