鸡兔同笼关系式：鸡的数量×2+兔的数量×4=腿的数量
质疑：如果知道了腿的总数能知道鸡兔各几只吗
引出课题：早在1500多年前，我国古代的数学家就在《孙子算经》中提出了这样有意思的题目，今天我们就一起来研究。(Chicken with rabbit cage equation: the number of chickens * 2 + the number of rabbit * 4 = the number of legs
Question: if you know the total number of legs can know the few chicken rabbit
Which leads to the topic: as early as 1500 years ago, ancient Chinese mathematician in \"the grandson is the\" raised the interesting topic, today we will study together.)