兰兰做了9只纸船,明明做了8只,他俩共做了多少只纸船?9U0m)F8B'v,Z
算式:提示,l.B2m7}'q3L2R'V-|9U0m)F8B'v,Z
答:他俩共做了0T.~7G7b/P6o1l只纸船。9U0m)F8B'v,Z