6.8的2.5倍是多少？(O1O;K-v't3R6r,C-m
算式：提示)K-C0f:Z8k-s,B6z/b7k-z(O1O;K-v't3R6r,C-m
答： 6.8的2.5倍是+q+V7z8c/n。(O1O;K-v't3R6r,C-m