如图,做一个长方体形状的铁皮通风管。通风口是边长为2.5分米的正方形，管长1米。需要多少平方分米？
告诉我我要过程，我不会，纠结中》》》
推荐回答（1个）
1米=10分米
铁皮=2.5×4×10=100平方分米
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