我们知道,日历本身就是用数学方法编写的,它本身就包含了很多的数学问题.日历中的相邻数字之间有下列一些重要的关系:左右两数相差为1,即左边一个日期比右边一个日期小1;上下相差为7,即日历上同一列的日期的星期都相同,下面一个日期比上面一个大7.掌握这些数字间的关系,问题就迎刃而解了.现举例说明. We know that the calendar itself is written in mathematics. It itself contains a lot of math problems. There are some important relations between the adjacent numbers in the calendar: the difference between left and right numbers is 1, that is, the date on the left is more than on the right. A date is small; the difference between the upper and lower is 7, that is, the days of the same column in the calendar are all the same, and the next date is bigger than the one above. 7. To grasp the relationship between these numbers, the problem is solved. Now illustrate.