池塘里有16条鱼，游走一些，还剩12条，游走几条？5n5O1A+B3k:_9\'_5e3a2H
算式：提示(A3[3J)w/A1m:W+D2I5L5n5O1A+B3k:_9\'_5e3a2H
答：游走;K5L1c0H+S+h2x2p8r条。5n5O1A+B3k:_9\'_5e3a2H