“恰恰”乐园里正在召开一场快乐的舞会。在舞会开始时,来参加舞会的客人都要互相握手问好。现在已经来了6位客人,他们一共握手多少次呢?【思路点睛】参加舞会的客人来了6位,人有点儿多,我们可以从简单的开始想。如果只有2人,那么握手的次数只有1次;如果有3人,那么握手的次数就是3次;如果有4人,握手的次数就是6 “Just ” Paradise is holding a happy ball. At the beginning of the ballroom, guests who come to the ballroom should shake hands and say hello. Now 6 guests have come, how many times did they shook hands? [Ideas dot com] The guests came to the ball six, a little more people, we can start from simple to think. If there are only 2 people, then the number of handshakes only once; if there are 3 people, then the number of handshakes is 3 times; if there are 4 people, the number of handshakes is 6