123123乘321减321321乘123的简便计算
问题描述:
123123乘321减321321乘123的简便计算
答
123123*321-321321*123 =123*1001*321-321*1001*123 =0
123123乘321减321321乘123的简便计算
123123*321-321321*123 =123*1001*321-321*1001*123 =0