标题: 放两只数学狗吧 [打印本页] 作者: nana2012two 时间: 2017-6-8 10:57 标题: 放两只数学狗吧 top shelf books to bottom shelf books is 5:3, removing 11books from top shelf to bottom shelf, the new ratio is 3:4. Which number is the original top shelf books? 答案 有 19, 23, 35。 最后选了35