广西防城港市2021—2022学年下学期期末教学质量检测七年级数学试题（含答案）

这是一份广西防城港市2021—2022学年下学期期末教学质量检测七年级数学试题（含答案），共6页。试卷主要包含了选择题，填空题，解答题等内容，欢迎下载使用。
2022年春季学期教学质量检测七年级数学参考答案一、选择题（本大题共12小题，每小题3分，共36分）题号123456789101112答案ADBDADCABCBD二、填空题（本大题共6小题，每小题3分，共18分）13．； 14．假命题；15．；  16．答案不唯一； 17．一； 18．．三、解答题（本大题共66分）19．（本题满分6分）解：原式=··················································3分=····························································4分            =························································5分            =4·······················································6分20．（本题满分6分）解：由①—②得：···········································1分··························································3分把代入①得······················································5分方程组得解为··············································6分21．（本题满分6分）解:解不等式①得·········································2分      解不等式②得············································4分不等式组的解集为············································5分        作图（略）·················································6分22．（本题满分8分）    解：（1）（图略）·············································5分       （2）（1，－2），（－2，－4），（－1，－1）···················8分     23．（本题满分8分）（每空1分）证明：（  两直线平行，同位角相等  ）   又平分（已知 ）（ 等量代换  ）（ 等量代换  ）（ 内错角相等，两直线平行）（ 两直线平行，内错角相等）24．（本题满分10分）  （1）200 名；··················································3分（2）解：6000×30%=1800（册）     答：估计学校购买科普类读物1800册。···························6分（3）解：n=200×30%=60（人）·····································8分m=200-60-70-30=40（人）·······································10分25．（本题满分10分）（1）解：，····················································1分·····························································2分·····························································3分（2）证明：····················································4分·····························································5分·····························································6分·····························································7分（3）作图略····················································8分····························································10分26．（本题满分12分）（1）3680元····················································3分（2）解：设甲校有名学生准备参加演出，乙校有名学生准备参加演出，  根据题意可得：··············································4分·····························································6分      解得：···················································7分答：甲校有名学生准备参加演出，乙校有名学生准备参加演出.·············8分（3）由题意得两校联合购买82套服装需要的费用为：，······························9分两校联合购买91套服装需要的费用为：，·····························10分.····························································11分两校联合购买91套服装最省钱. 12分