上星期天,爸爸带我到姑姑家去玩,恰逢她家正在装修新房,师傅们干得满头大汗,我们自行参观。在主房内,一位师傅正在给大衣柜安装密码箱,这个密码箱是按键式的,爸爸指着上面的10个数字键,笑着问我:“要是小偷来开密码箱,但他不知道6位数的密码,他最多要输入多少次才能打开?你能不能应用学过的知识来解决这个 Last Sunday, my dad took me to my aunt’s house to play, coinciding with her home being renovated new house, the masters sweat profusely, we visit. In the main room, a master is installing a lockbox for a large closet. The lockbox is push-button. My father pointed to the ten number keys above and smiled and asked me: ”If the thief was to open the lockbox, he did not know 6 Number of digits, how many times can he type in to open? Can you apply the learned knowledge to solve this