5*6*0.3=9
5级台阶一共占地9平方米
5*(6*0.3+6*0.2)=15
需要15平方米的红地毯
学校科技馆大门前有5级台阶,每级台阶长6米,宽0.3米,高0.2米.5级台阶一共占地多少平方米?给这些台阶铺
学校科技馆大门前有5级台阶,每级台阶长6米,宽0.3米,高0.2米.5级台阶一共占地多少平方米?给这些台阶铺
5级台阶一共占地多少平方米?给这些台阶铺上红地毯,至少需要多少平方米的红地毯?（6分）
5级台阶一共占地多少平方米?给这些台阶铺上红地毯,至少需要多少平方米的红地毯?（6分）
数学人气：480 ℃时间：2019-08-22 17:11:58
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