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科目: 來源:數(shù)學(xué)教研室 題型:013

某人以八折的優(yōu)惠價(jià)購買一套服裝省15元,那么某人購買這套服裝時(shí),用了   

元。······················································································································  

A35    B60    C75   D150

 

 

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科目: 來源:數(shù)學(xué)教研室 題型:013

下面變形沒有依據(jù)等式性質(zhì)的是·····································································   

A,那么r=18   BS+5=7,那么S=2

C.m+2=-m-1,那么2m=-3   D.,那么2x=5

 

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科目: 來源:數(shù)學(xué)教研室 題型:013

下列說法正確的是··························································································   

A.含有未知數(shù)的式子叫方程式   B.方程中未知數(shù)的值是方程的解

C.方程是等式         D.是一元一次方程

 

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科目: 來源:數(shù)學(xué)教研室 題型:013

甲池有水,乙池有水,甲池線分鐘流入乙池,n分鐘后兩水池的水量相等,則n等于    ( 。

A.  B.   C.  D.

 

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科目: 來源:數(shù)學(xué)教研室 題型:013

隨著計(jì)算機(jī)技術(shù)的迅猛發(fā)展,電腦價(jià)格不斷降低,某品牌電腦按原售價(jià)降低m元后,又降價(jià)20%,現(xiàn)售價(jià)為n元,那么該電腦的原售價(jià)為······························································································ ( 。

A.元    B.元  C.元  D.元 

 

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科目: 來源:數(shù)學(xué)教研室 題型:013

一件工作,甲單獨(dú)做20h完成,乙單獨(dú)做12h完成,現(xiàn)由甲獨(dú)做4h,剩下的甲、乙合做,還要幾h完成?若設(shè)剩下部分要x h完成,下列方程正確的是···················································································· ( 。

A           B

C.           D.

 

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科目: 來源:數(shù)學(xué)教研室 題型:013

某商店選用每kg 28元的甲種糖3 kg,每kg 20元的乙種糖2kg,每kg12元的丙種糖5kg,混合成雜糖后出售,則這種雜拌糖平均每kg售價(jià)是·················································································· ( 。

A.18元      B.18.4元     C.19.6元     D.20元

 

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科目: 來源:數(shù)學(xué)教研室 題型:013

在某公路的干線上有相距108kmA、B兩個(gè)車站,某日16點(diǎn)整,甲乙兩輛汽車分別從A、B兩站同時(shí)出發(fā),相向而行,已知甲車速度為45km/h,乙車速度為36km/h,兩車相遇時(shí)間是·················· ( 。

A.16點(diǎn)20分   B.17點(diǎn)20分   C.17點(diǎn)30分    D.16點(diǎn)50分

 

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科目: 來源:數(shù)學(xué)教研室 題型:013

一份數(shù)學(xué)試卷有20道選擇題,規(guī)定做對(duì)一題得5分,一題不做或做錯(cuò)扣1分,結(jié)果某學(xué)生得分為76分,該同學(xué)做對(duì)題目的個(gè)數(shù)是····································································································· ( 。

A.15      B.16     C.17      D.18

 

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科目: 來源:數(shù)學(xué)教研室 題型:013

解方程的過程中,正確的步驟是··························································· ( 。

A.移項(xiàng)后再移項(xiàng)   B.僅移項(xiàng)就可解出結(jié)果

C.先移項(xiàng)再合并   D.先合并再移項(xiàng)

 

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