体育店有57个皮球，每三个装在一个盒子里，能正好装完吗？5l({:s'P4@3v1X+d0k6x-L3|3U;l+`(k
算式：提示:i.V;_)A8D2^7i;?8j;J5l({:s'P4@3v1X+d0k6x-L3|3U;l+`(k
答：+J8q'k7]0\+t装完。5l({:s'P4@3v1X+d0k6x-L3|3U;l+`(k