13只鸡排成一队,其中有1只大公鸡,从前面数,它站在第8,它的后面有几只鸡?,{:[0\5h+P1^
算式:提示7X6p6B7e'u3Y5B,{:[0\5h+P1^
口答:它的后面有1K0B/z,c+K2Z/|:O1l3H2i5J1`:z'B只鸡。,{:[0\5h+P1^