广西壮族自治区防城港市2022-2023学年七年级上学期期末质量检测数学试题
展开
2022年秋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 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
答案 | B | A | C | C | B | D | D | B | D | B | A | D |
二、填空题（本大题共6小题，每小题3分，共18分）
13．； 14．1； 15．两点之间，线段最短； 16．90； 17．崇； 18．2．
三、解答题（本大题共66分）
19．（本题满分6分）
解：原式=··················································2分
=························································3分
= ·······················································5分
= ·······················································6分
20．（本题满分6分）
解：······················································2分
······················································3分
························································4分
···················································5分
···················································6分
21．（本题满分6分）
解:原式=·······················································2分
=··························································4分
，
:原式=
=····················································6分
22．（本题满分8分）
解:（1）···················································6分
（2）略····················································8分
23．（本题满分8分）
解：（1）··················································2分
···················································4分
（2）
····················································5分
····················································6分
···············································8分
24．（本题满分10分）
解：（1）,是中点
···················································2分
又点是线段中点．
······················································4分
······················································5分
（3）设秒后甲、乙相遇····································6分
解得 ·················································9分
答：3秒后甲、乙相遇·····································10分
25．（本题满分10分）
（1）··················································3分
（2）解：
······················································4分
又平分
······················································5分
又
······················································7分
（3）·················································10分
26.（本题满分12分）
（1）2760元····················································3分
（2）解：设甲班级有名学生准备参加演出，则可列方程为·················4分
·························································6分
解得·····················································7分
（名）························································8分
答：甲班级有52名学生准备参加演出，乙班级有40名学生准备参加演出.·······9分
（3）解：两班联合购买91套服装的费用：（元）
两班联合购买84套服装的费用：（元）
甲、乙单独购买的总费用：（元）
甲乙两班联合购买91套演出服装比其他购买方案更省钱. ................................12分
广西壮族自治区防城港市2022-2023学年七年级下学期期末数学试题（含答案）： 这是一份广西壮族自治区防城港市2022-2023学年七年级下学期期末数学试题（含答案），共8页。试卷主要包含了本试卷分第I卷两部分，不能使用计算器，若，的值为，若，则下列各式中正确的是等内容，欢迎下载使用。
广西壮族自治区防城港市2022-2023学年八年级下学期6月期末数学试题： 这是一份广西壮族自治区防城港市2022-2023学年八年级下学期6月期末数学试题，共7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。
广西壮族自治区防城港市2022-2023学年七年级下学期6月期末数学试题： 这是一份广西壮族自治区防城港市2022-2023学年七年级下学期6月期末数学试题，共7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。
