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歡迎您訪問數學考題練習:甲安裝隊為A小區安裝66臺空調,已安裝隊為B小!

數學考題練習:甲安裝隊為A小區安裝66臺空調,已安裝隊為B小

更新時間:2024-01-12 12:59:24作者:貝語網校

甲安裝隊為A小區安裝66臺空調,已安裝隊為B小區安裝60臺空調,兩隊同時開工且恰好同時完工,甲隊比乙隊每天多安裝2臺,若設乙隊每天安裝x臺,則下面所列方程中,正確的是

A.=

B.=

C.=

D.=

試題答案

A

試題解析

關鍵描述語為:“兩隊同時開工且恰好同時完工”,那么等量關系為:甲隊所用時間=乙隊所用時間.

解答:乙隊用的天數為:,甲隊用的天數為:.

則所列方程為:=.

故選A.

點評:本題主要考查的是由實際問題抽象出分式方程.找出題目中的關鍵語,找到相應的等量關系是解決問題的關鍵,注意:工作時間=工作總量÷工作效率.

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