大连妇科哪家医院好:37×999+62×999+99=???

来源:百度文库 编辑:神马品牌网 时间:2024/04/29 18:41:14

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