院子里有9只麻雀，飞走了2只，又飞来了3只，现在院子里有几只麻雀？2O.F-g*A1?4U-H-W+q9\
算式：提示6E'y+@.r2O.F-g*A1?4U-H-W+q9\
答：现在院子里有.K*g1k)f1{;V+`'n/n4P0C(N6f7m*u5w/a3Q6_只麻雀。2O.F-g*A1?4U-H-W+q9\