婚宴一般怎么点菜:37×999+62×999+99=???
来源:百度文库 编辑:高校问答 时间:2024/05/09 16:10:29
37×999+62×999+999
=(37+62+1)*999
=100*999
=99900
37*999+62*999+99
=37*(1000-1)+62*(1000-1)+99
=37000+62000-(37+62)+99
=99000
=(37+62)*999+99
=99*999+99
=99*(999+1)
=99000
=(37+62)*(1000-1)+99
=99*1000
=990000
99000