2024年宁德初中数学第一次质检数学答案 .pdf

2024年宁德市初中毕业班第一次质量检测

数学试题参考答案及评分标准

⑴本解答给出了一种或几种解法供参考，如果考生的解法与本解答不同，可参照本答案的

评分标准的精神进行评分．

⑵对解答题，当考生的解答在某一步出现错误时，如果后续部分的解答未改变该题的立意，

可酌情给分．

⑶解答右端所注分数表示考生正确作完该步应得的累加分数．

⑷评分只给整数分，选择题和填空题均不给中间分．

一、选择题：（本大题有10小题，每小题4分，满分40分）

1．C；2．B；3．C；4．B；5．D；6．B；7．A；8．D；9．A；10．D．

二、填空题：（本大题有6小题，每小题4分，满分24分）

2

11．x(x−2)；12．；13．5（答案不唯一）；14．120；15．；16．17−3．

−1

3

三、解答题（本大题共9小题，共86分．请在答题卡的相应位置作答）

．．．

17．（本题满分8分）

解法一：

11

原式=1+9（−）··················································································4分

69

3

=1+−1··························································································6分

2

3

=．······························································································8分

2

解法二：

11

原式=1+9（−）··················································································4分

69

1

=1+9·························································································6分

18

3

=．······························································································8分

2

18．（本题满分8分）

证明：∵AB∥CE，

∴∠BAC=∠ECD．··················································································3分

∵∠B=∠E，AC=CD，·············································································5分

∴△ABC≌△CED．················································································8分

数学试题参考答案及评分说明第1页共8页

19．（本题满分8分）

3x−12，①



解：

2（x+1)3x.②

解不等式①，得x