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三年级思维题，求图形的周长。多数同学认为条件不够，转化思妙解
小学数学思维拓展题76/419
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![哈尔滨市气象台发布道路冰雪红色预警[I级/特别严重]](http://p26-sign.bdxiguaimg.com/tos-cn-p-0015/ow6BmZGvLpsbiOLen748ACaBfuAIQEDeAOzdOI~tplv-pk90l89vgd-fglass:864:486:90.jpeg?appId=32&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=101_middle_image&imageType=list&isImmersiveScene=0&is_stream=0&lk3s=9d3f5bff&logId=202501201444088F72AAC76AB5583FDFBC&requestFrom=101&x-expires=1768891449&x-signature=rOubfrI81HjEijZkVat3g3Vbxxk%3D)
