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第1頁/共1頁數(shù)學(xué)2024年11月學(xué)校_________________班級________姓名________學(xué)號________考生須知1.本試卷共4頁,共三道大題,26道小題,滿分100分??荚嚂r間100分鐘。2.在試卷和答題卡上準(zhǔn)確填寫學(xué)校名稱、班級、姓名和學(xué)號。3.試題答案一律填涂或書寫在答題卡上,在試卷上作答無效。4.2B5.考試結(jié)束,請將本試卷和答題卡一并交回。一、選擇題(共20分,每題2分)第110題均有四個選項(xiàng),符合題意的選項(xiàng)只有一個.1.的相反數(shù)是A. B. C. D.2.下表是幾種液體在標(biāo)準(zhǔn)大氣壓下的沸點(diǎn):液體名稱液態(tài)氧液態(tài)氫液態(tài)氮液態(tài)氦沸點(diǎn)/℃-183-252.78-196-268.9則沸點(diǎn)最低的液體是A.液態(tài)氧 B.液態(tài)氫 C.液態(tài)氮 D.液態(tài)氦3.據(jù)統(tǒng)計(jì),今年“十·一”小長假期間,近70000人次游覽了園博園“京彩燈會”.將70000用科學(xué)記數(shù)法表示應(yīng)為A. B. C. D.4.有理數(shù)a,b,c在數(shù)軸上的對應(yīng)點(diǎn)的位置如圖所示,則下列式子中正確的是A. B.C. D.5.已知是方程的解,則的值是A.-3 B.-1 C.1 D.36.下列運(yùn)算中,正確的是A. B.C. D.7.如果,那么根據(jù)等式的性質(zhì),下列變形不正確的是A. B.C. D.8.下面四個式子中,不能表示圖中陰影部分面積的是A. B.C. D.9.我國古代典籍《莊子·天下篇》中有這樣一句話:“一尺之棰,日取其半,萬世不竭”.現(xiàn)有一根長為1尺的木桿,第1次截取其長度的一半,第2次截取其第1次剩下長度的一半,第3次截取其第2次剩下長度的一半,…,則第99次截取后,木桿剩下的長度為A.尺 B.尺 C.尺 D.尺10.右圖是某月的月歷,現(xiàn)用“”圖形在月歷中框出5個數(shù),它們的和為55.不改變“”圖形的大小,將“”圖形在該月歷上移動,所得5個數(shù)的和可能是A.40 B.88C.107 D.110二、填空題(共16分,每題2分)11.用四舍五入法對1.654取近似數(shù)(精確到十分位)是.12.比較大小:(填“<”,“>”或“=”).13.計(jì)算:,=.14.請寫出一個與為同類項(xiàng)的整式:.15.一臺電腦原價(jià)為a元,降價(jià)20%后,又降低m元,現(xiàn)售價(jià)為元.16.已知,則代數(shù)式的值為.17.觀察下列代數(shù)式:,,,,,…,按照上述規(guī)律,第2024個代數(shù)式是,第個代數(shù)式是.18.計(jì)算機(jī)將信息轉(zhuǎn)換成二進(jìn)制數(shù)處理的,二進(jìn)制即"逢2進(jìn)1",如(1101)2表示二進(jìn)制數(shù),將它轉(zhuǎn)換成十進(jìn)制形式是1×23+1×22+0×21+1×20=13,那么將二進(jìn)制數(shù)(10111)2轉(zhuǎn)換成十進(jìn)制是,將十進(jìn)制數(shù)21轉(zhuǎn)換成二進(jìn)制是.三、解答題(共64分,第19題16分,每小題4分;第20-21題,每題10分,每小題5分;第22-23題,每題5分;第24-26題,每題6分)19.計(jì)算:(1);(2);(3);(4).20.化簡:(1);(2).21.解方程:(1);(2).22.已知,,求代數(shù)式的值.23.如圖,數(shù)軸上點(diǎn)A表示的數(shù)為a,點(diǎn)B表示的數(shù)為b,點(diǎn)C表示的數(shù)為c,其中b是最大的負(fù)整數(shù),c是最小的正整數(shù).(1)b=,c=;(2)用“<”將a,,-c,c連接起來;(3)點(diǎn)P為數(shù)軸上一動點(diǎn),則的最小值為.24.隨著人們生活水平的提高,家用轎車越來越多地進(jìn)入家庭.小明家買了一輛小轎車,他記錄了連續(xù)7天中每天行駛的路程(如下表,單位:km),以50km為標(biāo)準(zhǔn),多于50km的記為“+”,不足50km的記為“-”,剛好50km的記為“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)這七天中,行程最多的一天比行程最少的一天多行駛了多少千米?(2)請求出這七天中平均每天行駛多少千米;(3)若行駛100km需用汽油6L,汽油價(jià)為8.2元/L,請估計(jì)小明家一個月(按30天計(jì)算)的汽油費(fèi)用是多少元?(結(jié)果保留整數(shù))25.為迎接新生,某中學(xué)計(jì)劃添置100張課桌和把椅子.現(xiàn)經(jīng)調(diào)查發(fā)現(xiàn),某家具廠的每張課桌定價(jià)為200元,每把椅子定價(jià)為80元,而廠方在開展促銷活動期間,向客戶提供了兩種優(yōu)惠方案:方案一:每買一張課桌就贈送一把椅子.方案二:課桌和椅子都按定價(jià)的80%付款.(1)用含的代數(shù)式分別表示方案一與方案二各需付款多少元?(2)當(dāng)時,通過計(jì)算說明該中學(xué)選擇哪種方案更省錢.26.閱讀下面方框內(nèi)的材料:一個含有多個字母的式子中,任意交換兩個字母的位置,當(dāng)字母的取值均不相等,且都不為一個含有多個字母的式子中,任意交換兩個字母的位置,當(dāng)字母的取值均不相等,且都不為0時,式子的值都不變,這樣的式子叫作對稱式.例如:式子abc中任意兩個字母交換位置,可得到式子bac,acb,cba,因?yàn)閍bc=bac=acb=cba,所以abc是對稱式.而式子中的字母a,b交換位置,得到式子,但是,所以不是對稱式.解答下面的問題:(1)下列式子:①;②;③,其中是對稱式的是(填序號);(2)寫出一個系數(shù)為-2,只含有字母a,b且次數(shù)為6的單項(xiàng)式,使該單項(xiàng)式是對稱式;(3)已知,,求,并判斷所得結(jié)果是否是對稱式.
一、選擇題(共20分,每題2分)題號12345678910選項(xiàng)ADBBADCCBD二、填空題(共16分,每題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題16分,每小題4分;第20-21題,每題10分,每小題5分;第22-23題,每題5分;第24-26題,每題6分)19.計(jì)算(本題滿分16分,每小題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.化簡(本題滿分10分,每小題5分)解:(1)=··········································2分=··········································4分=.···········································5分(2)=············································2分=·············································4分=.·············································5分21.解方程(本題滿分10分,每小題5分)解:(1),·············································2分,·············································3分,·············································4分.·············································5分(2),···············································2分,···············································3分,···············································4分.···············································5分22.(本題滿分5分)解:=················································2分==··················································4分當(dāng),時,原式=.··················································5分23.(本題滿分5分)解:(1)-1,1;··················································2分(2);··················································4分(3).···················································5分24.(本題滿分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駛了km.(2)·········································3分=50+7÷7=51km.··············································4分答:這七天中平均每天行駛51km.(3)···············································5分=752.76≈753元.··············································6分答:小明家一個月(按30天計(jì)算)的汽油費(fèi)用是元.25.(本題滿分6分)解:(1)方案一:···············································1分==元.·········································
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