美国国旗的变化无论从历史方面、社会方面还是数字方面都极为有趣。本文阐述的是与美国国旗有关的数字问题。1818年4月4日,美国国会议案规定,美国每加一个州,就在其国旗上加一颗五角星。这次设计出的国旗为长方形,蓝底色,20颗白五角星,7根红条与6根白条相间。20颗星分成4排,每排5个,正好为长方形。从1913年至1959年间,美国已有48个州会聚在联邦中。将五角星分成6排,每排8个,也正好是长方形。1959年至1960年间,阿拉斯 The change of the American flag is extremely interesting in terms of history, social aspects and numbers. This article addresses the issue of numbers related to the American flag. April 4, 1818, the U.S. Congress passed a bill that states that for every additional state in the United States, a five-pointed star will be added to its national flag. The design of the national flag for the rectangle, blue, 20 white five-pointed star, seven red and white strips of white and white. 20 stars divided into 4 rows, each row of 5, just for the rectangle. From 1913 to 1959, 48 states in the United States have converged in the Federation. The five-pointed star is divided into 6 rows, each row of 8, also happens to be rectangular. From 1959 to 1960, Arras