简便计算:48×17+51×84 65×70+360×7-70

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/05 14:29:48
简便计算:48×17+51×84 65×70+360×7-70

简便计算:48×17+51×84 65×70+360×7-70
简便计算:48×17+51×84 65×70+360×7-70

简便计算:48×17+51×84 65×70+360×7-70
48X17+51X84 65X70+360X7-70
=16X3X17+51X84 =65X70+36X70-70
=51X16+51X84 =70X(65+36-1)
=51X(16+84) =7000
=5100