长方形知道周长和宽,怎么算长jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj

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长方形知道周长和宽,怎么算长jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj长方形知道周长和宽,怎么算长jjjjjjjjjjjjjjjjjjjjjjjjj

长方形知道周长和宽,怎么算长jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
长方形知道周长和宽,怎么算长
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长方形知道周长和宽,怎么算长jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
长方形的长=周长÷2-宽