12-4=8个8-4=4个4-4=0个所以可以放3盘.回答完毕~有疑问请追问，我一定尽快回复你~无疑问请点击【采纳】，同时预祝学习进步~\(^o^)/~我不是学霸，叫我赌神~\(^o^)/~~\(^o^)/~~\(^o^)/~~\(^o^)/~
