30 20 131/3 88/9( )( )找规律
问题描述:
30 20 131/3 88/9( )( )找规律
2个就可以,
13又13分之1 8又9分之8 接下来``````
答
30 * 2/3 = 20
20 * 2/3 = 13 1/3
13 1/3 * 2/3 = 8 8/9
8 8/9 * 2/3 = 5 25/27
5 25/27 * 2/3 = 3 77/81