河里有11只鸭子，游走了8只，还有几只？4U,D-@(L1n,?;[/|2q/A9A3|)f;c
算式：提示-m:U6p1])C)L7K(r,D3L4U,D-@(L1n,?;[/|2q/A9A3|)f;c
答：还有-N.c)C9K只。4U,D-@(L1n,?;[/|2q/A9A3|)f;c