杨辉是我国古代数学家和数学教育家,他对纵横图的研究源于一件小事。当时,杨辉还是地方官,一次外出巡游时遇到一群孩童挡道。杨辉问原因,得知他们正在地上做一道由一位老先生出的趣题:把1到9的九个数分行排列,不论竖着加、横着加,还是斜着加,结果都要等于15。杨辉想起他在《大戴礼记》一书中也曾见过这种算题,便和孩童们一起算了起来,直到中午,终于解出算题。 Yang Hui is an ancient mathematician and mathematics educator in our country. His research on aspect maps originates from a trivial matter. At the time, Yang Hui was still a local officer who encountered a group of children in a road trip. Yang Hui asked why they were making a funny story from an old gentleman on the ground: arrange the nine numbers from 1 to 9 in rows, whether vertical, horizontal, or diagonal, the result must be equal to 15 . Yang Hui remembered that he had seen this kind of arithmetic in the book of Dai Dai Li Ji, and then counted it up with the children until noon finally solved the arithmetic.