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今天,俞老师给我们布置了这样一道思维训练题:春节快到了,同学们都互相赠送贺卡留作纪念。小帅、小明、小天、小涵四个好朋友,每人都要送给另外三个人每人一张。算一算,一共要准备多少张贺卡?一看题目,我不知道从何下手,看着我愁眉苦脸的样子,妈妈走过来对我说:“书书,有些题目可以通过画图来解决,你不妨试一试。”妈妈的话提醒了我,我拿起笔来,一边画,一边想:送贺卡,小帅送给小明一张,小明也要送给小帅一张,他们之间应该是相互的,顿时,
Today, Teacher Yu has arranged such a train of thought training questions for us: Spring Festival is coming, and students are giving each other greeting cards as souvenirs. Xiaoshuai, Xiao Ming, Xiao Tian, Xiao Han four good friends, each person should give each of the other three individuals one. Count the total number of cards to be prepared? A look at the title, I do not know where to start, looking at me scowl look, my mother came over and said to me: “Book, some questions can be solved by drawing, you May wish to try. ”Mom’s words remind me, I picked up the pen, while painting, while thinking: to send greeting cards, Xiaoshao gave Xiaoming one, Xiaoming also gave Xiaoshuai, between them should be Mutual, suddenly,