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10cm=0.1米 正方形木板的邊長=800÷0.1=8000(米)=800000(cm), 好大的正方形木板! 題目抄寫錯了吧?假如鋸下的面積為800平方釐米, 正方形木板的邊長=800÷10=80(cm),
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