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第1页/共1页数学2024年11月学校_________________班级________姓名________学号________考生须知1.本试卷共4页,共三道大题,26道小题,满分100分。考试时间100分钟。2.在试卷和答题卡上准确填写学校名称、班级、姓名和学号。3.试题答案一律填涂或书写在答题卡上,在试卷上作答无效。4.2B5.考试结束,请将本试卷和答题卡一并交回。一、选择题(共20分,每题2分)第110题均有四个选项,符合题意的选项只有一个.1.的相反数是A. B. C. D.2.下表是几种液体在标准大气压下的沸点:液体名称液态氧液态氢液态氮液态氦沸点/℃-183-252.78-196-268.9则沸点最低的液体是A.液态氧 B.液态氢 C.液态氮 D.液态氦3.据统计,今年“十·一”小长假期间,近70000人次游览了园博园“京彩灯会”.将70000用科学记数法表示应为A. B. C. D.4.有理数a,b,c在数轴上的对应点的位置如图所示,则下列式子中正确的是A. B.C. D.5.已知是方程的解,则的值是A.-3 B.-1 C.1 D.36.下列运算中,正确的是A. B.C. D.7.如果,那么根据等式的性质,下列变形不正确的是A. B.C. D.8.下面四个式子中,不能表示图中阴影部分面积的是A. B.C. D.9.我国古代典籍《庄子·天下篇》中有这样一句话:“一尺之棰,日取其半,万世不竭”.现有一根长为1尺的木杆,第1次截取其长度的一半,第2次截取其第1次剩下长度的一半,第3次截取其第2次剩下长度的一半,…,则第99次截取后,木杆剩下的长度为A.尺 B.尺 C.尺 D.尺10.右图是某月的月历,现用“”图形在月历中框出5个数,它们的和为55.不改变“”图形的大小,将“”图形在该月历上移动,所得5个数的和可能是A.40 B.88C.107 D.110二、填空题(共16分,每题2分)11.用四舍五入法对1.654取近似数(精确到十分位)是.12.比较大小:(填“<”,“>”或“=”).13.计算:,=.14.请写出一个与为同类项的整式:.15.一台电脑原价为a元,降价20%后,又降低m元,现售价为元.16.已知,则代数式的值为.17.观察下列代数式:,,,,,…,按照上述规律,第2024个代数式是,第个代数式是.18.计算机将信息转换成二进制数处理的,二进制即"逢2进1",如(1101)2表示二进制数,将它转换成十进制形式是1×23+1×22+0×21+1×20=13,那么将二进制数(10111)2转换成十进制是,将十进制数21转换成二进制是.三、解答题(共64分,第19题16分,每小题4分;第20-21题,每题10分,每小题5分;第22-23题,每题5分;第24-26题,每题6分)19.计算:(1);(2);(3);(4).20.化简:(1);(2).21.解方程:(1);(2).22.已知,,求代数式的值.23.如图,数轴上点A表示的数为a,点B表示的数为b,点C表示的数为c,其中b是最大的负整数,c是最小的正整数.(1)b=,c=;(2)用“<”将a,,-c,c连接起来;(3)点P为数轴上一动点,则的最小值为.24.随着人们生活水平的提高,家用轿车越来越多地进入家庭.小明家买了一辆小轿车,他记录了连续7天中每天行驶的路程(如下表,单位:km),以50km为标准,多于50km的记为“+”,不足50km的记为“-”,刚好50km的记为“0”.第一天第二天第三天第四天第五天第六天第七天-8-11-140-16+38+18(1)这七天中,行程最多的一天比行程最少的一天多行驶了多少千米?(2)请求出这七天中平均每天行驶多少千米;(3)若行驶100km需用汽油6L,汽油价为8.2元/L,请估计小明家一个月(按30天计算)的汽油费用是多少元?(结果保留整数)25.为迎接新生,某中学计划添置100张课桌和把椅子.现经调查发现,某家具厂的每张课桌定价为200元,每把椅子定价为80元,而厂方在开展促销活动期间,向客户提供了两种优惠方案:方案一:每买一张课桌就赠送一把椅子.方案二:课桌和椅子都按定价的80%付款.(1)用含的代数式分别表示方案一与方案二各需付款多少元?(2)当时,通过计算说明该中学选择哪种方案更省钱.26.阅读下面方框内的材料:一个含有多个字母的式子中,任意交换两个字母的位置,当字母的取值均不相等,且都不为一个含有多个字母的式子中,任意交换两个字母的位置,当字母的取值均不相等,且都不为0时,式子的值都不变,这样的式子叫作对称式.例如:式子abc中任意两个字母交换位置,可得到式子bac,acb,cba,因为abc=bac=acb=cba,所以abc是对称式.而式子中的字母a,b交换位置,得到式子,但是,所以不是对称式.解答下面的问题:(1)下列式子:①;②;③,其中是对称式的是(填序号);(2)写出一个系数为-2,只含有字母a,b且次数为6的单项式,使该单项式是对称式;(3)已知,,求,并判断所得结果是否是对称式.

一、选择题(共20分,每题2分)题号12345678910选项ADBBADCCBD二、填空题(共16分,每题2分)11.1.7;12.>;13.-6,-16;14.(答案不唯一);15.;16.;17.,;18.23,.三、(共64分,第19题16分,每小题4分;第20-21题,每题10分,每小题5分;第22-23题,每题5分;第24-26题,每题6分)19.计算(本题满分16分,每小题4分)解:(1)=12-3-7········································2分=2.········································4分(2)=········································2分=-(6.5×2×3)=-39.········································4分(3)=·········································2分=-7.········································4分(4)=········································3分==.·········································4分20.化简(本题满分10分,每小题5分)解:(1)=··········································2分=··········································4分=.···········································5分(2)=············································2分=·············································4分=.·············································5分21.解方程(本题满分10分,每小题5分)解:(1),·············································2分,·············································3分,·············································4分.·············································5分(2),···············································2分,···············································3分,···············································4分.···············································5分22.(本题满分5分)解:=················································2分==··················································4分当,时,原式=.··················································5分23.(本题满分5分)解:(1)-1,1;··················································2分(2);··················································4分(3).···················································5分24.(本题满分6分)解:(1)···················································1分=54km.···················································2分答:行程最多的一天比行程最少的一天多行驶了km.(2)·········································3分=50+7÷7=51km.··············································4分答:这七天中平均每天行驶51km.(3)···············································5分=752.76≈753元.··············································6分答:小明家一个月(按30天计算)的汽油费用是元.25.(本题满分6分)解:(1)方案一:···············································1分==元.·········································

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