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2023至2024学年第一学期期中学业质量检测
七年级数学参考答案及评分标准
一、选择题:(本大题共12个小题,每小题4分,共48分.)
题号123456789101112
答案BCCCDDCACBCB
二、填空题:(本大题共6个小题,每小题4分,共24分.)
13.>14.线动成面15.916.-2517.418.380
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=7+4+(-5)············································2分
=11+(-5)
=6························································4分
334
=-×(−)×(−)
20.(本题4分)解:原式····················································2分
429
1
=−····································································4分
2
1[]
21.(本题4分)解:原式=−−×−······························1分
129
6
·
1
=−−×(−)······························2分
17
6
7
=−+······························3分
1
6
1
=
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