6.9*(1+3)*2.5
6.9
0.936
2.5
58
找规律
1. 8.75 4.375
2. 5.4 16.2
望采纳 谢谢
(1+3)*6.9*2.5=698.75 5.4(32+69-1)*0.58=58
找规律70,35,17.5,8.75,4.375