问题描述: 数学六年级上册《起跑线》怎么解 1个回答 分类:数学 2014-11-25 问题解答: 我来补答 12345678直径(m)72.675.177.680.182.685.187.690.1周长(m)228.08235.93243.79251.64259.50267.35275.20283.06全长(m)400407.85415.71423.56431.42439.27447.12454.98 展开全文阅读