- 262.06 KB
- 2023-05-25 11:36:05 发布
- 1、本文档内容版权归属内容提供方，所产生的收益全部归内容提供方所有。如果您对本文有版权争议，可选择认领，认领后既往收益都归您。
- 2、本文档由用户上传，本站不保证质量和数量令人满意，可能有诸多瑕疵，付费之前，请仔细先通过免费阅读内容等途径辨别内容交易风险。如存在严重挂羊头卖狗肉之情形，可联系本站下载客服投诉处理。
第1页（共2页）
2020至 2021学年第一学期期中学业水平测试
高新初中数学七年级参考答案及评分标准
一、选择题
题号 1 2 3 4 5 6 7 8 9 10 11 12
答案 B C B A C A C C D D D C
二、填空题:（本大题共 6个小题，每小题 4分，共 24分．）
13．＞ 14．﹣4 15．① 16．2 17．4b﹣2a
18．556
三、解答题:（本大题共 12个小题，共 78分．解答应写出文字说明、证明过程或演算步骤．）
19．（本题 4分）解：原式＝9+1﹣10·····················································································3分
＝0·····························································································4分
20．（本题 4分）解：原式= 25 × (−
1
5
) ×
1
5
× (−
4
3
) ·································································2分
=
4
3
．···························································································4分
21．（本题 4分）解：原式＝（5﹣1）m+（2﹣3）n··································································2分
＝4m﹣n······················································································4分
22．（本题 5分）解：﹣14﹣8+（﹣2）3×（﹣3）
＝﹣1﹣8+（﹣8）×（﹣3）········································································2分
=-1-8+24································································································3分
＝15······································································································5分
23．（本题 5分）解：原式＝x+6y2﹣4x﹣8x+4y2·······································································4分
＝10y2﹣11x···································································································5分
24．（本题 6分）解：所画图形如下所示：
························································································6分
25．（本题 6分）解： a※b＝（a+b）+（a﹣b），
∴13※5
＝（13+5）+（13﹣5）···································································································4分
＝26·······································...