199×2201
=(200-1)×2201
=200×2201-1×2201
=440200-2201
=440200-2200-1
=438000-1
=437999
199乘以2 201的简便运算
投稿：不会游泳的鱼
优质问答领域创作者
发布时间：2023-07-06 23:44:03
上一篇：1999地圈梁保卫战
199×2201
=(200-1)×2201
=200×2201-1×2201
=440200-2201
=440200-2200-1
=438000-1
=437999