216/9=24×4=96(鸭)
216-96=120
120/5=24
鸡48
鹅72
养鸡,鸭,鹅216只,其中鸭占9分之4,鸡鹅之比是2:3,鸡鸭多少只
养鸡,鸭,鹅216只,其中鸭占9分之4,鸡鹅之比是2:3,鸡鸭多少只
数学人气:293 ℃时间:2019-09-29 03:42:35
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