数学题六年级的,急~~~~~~~~~!50分~~~~~~~~~~~~~~~~~10分钟内1.在一个半径是20cm的圆形物品的上部和下部各围一圈铁丝,上部和下部铁丝接头处都是3cm,共用了( )厘米的铁丝.2.修同样长的公路,甲
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![数学题六年级的,急~~~~~~~~~!50分~~~~~~~~~~~~~~~~~10分钟内1.在一个半径是20cm的圆形物品的上部和下部各围一圈铁丝,上部和下部铁丝接头处都是3cm,共用了( )厘米的铁丝.2.修同样长的公路,甲](/uploads/image/z/751359-39-9.jpg?t=%E6%95%B0%E5%AD%A6%E9%A2%98%E5%85%AD%E5%B9%B4%E7%BA%A7%E7%9A%84%2C%E6%80%A5%7E%7E%7E%7E%7E%7E%7E%7E%7E%2150%E5%88%86%7E%7E%7E%7E%7E%7E%7E%7E%7E%7E%7E%7E%7E%7E%7E%7E%7E10%E5%88%86%E9%92%9F%E5%86%851.%E5%9C%A8%E4%B8%80%E4%B8%AA%E5%8D%8A%E5%BE%84%E6%98%AF20cm%E7%9A%84%E5%9C%86%E5%BD%A2%E7%89%A9%E5%93%81%E7%9A%84%E4%B8%8A%E9%83%A8%E5%92%8C%E4%B8%8B%E9%83%A8%E5%90%84%E5%9B%B4%E4%B8%80%E5%9C%88%E9%93%81%E4%B8%9D%2C%E4%B8%8A%E9%83%A8%E5%92%8C%E4%B8%8B%E9%83%A8%E9%93%81%E4%B8%9D%E6%8E%A5%E5%A4%B4%E5%A4%84%E9%83%BD%E6%98%AF3cm%2C%E5%85%B1%E7%94%A8%E4%BA%86%EF%BC%88++++++++%EF%BC%89%E5%8E%98%E7%B1%B3%E7%9A%84%E9%93%81%E4%B8%9D.2.%E4%BF%AE%E5%90%8C%E6%A0%B7%E9%95%BF%E7%9A%84%E5%85%AC%E8%B7%AF%2C%E7%94%B2)
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