在学习《年、月、日》时,老师通常都要介绍把“公历年份是4的倍数”的这一年判断为闰年;当“公历年份是整百数时,必须是400的倍数”方是闰年。因此,在判断某一年是不是闰年,就要用4或400去除这一年的年份数,这种方法一般都需要笔算才能完成,显得比较麻烦。这里向大家介绍一种口 When studying “Year, Month, Day”, the teacher usually introduces the year in which “Gregorian year is a multiple of 4” as a leap year; when “Gregorian year is a whole hundred, it must be a multiple of 400” Is a leap year. Therefore, to determine whether a year is a leap year, we must use 4 or 400 to remove the number of years of the year. This method generally requires pen and pen calculations to be completed, which is troublesome. Here to introduce a kind of mouth