鸡兔同笼,共30个头,82只脚,笼中有鸡( 19 )只,兔( 11 )只
( 30×4 - 82)÷(4 -2)
= 38 ÷2
= 19 只鸡
30 -19 = 11只兔
鸡兔同笼,共30个头,82只脚,笼中有鸡()只,兔()只
鸡兔同笼,共30个头,82只脚,笼中有鸡()只,兔()只
数学人气:240 ℃时间:2020-03-28 22:45:10
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