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我国古代以干支纪年,中学语文教学和各类语文试卷中常出现需推算公元某年的干支纪年的问题,现介绍一种简便而科学的推算方法。先推算天干,具体方法是:用公元纪年的最后一位数字(个位数)减3或加7,得数是几即从天于的第一位开始依天干顺序往后数几,数到的那位天干即该公元纪年的“干”。如公元1911年,个位数是1,甩1加7 得8,从天干的第一位开始数至第8位(甲乙丙丁戊已庚辛),此时算出用于支纪年时公元1911年的天干为“辛”,又如公元1641年,个位数是4,用4减3得1,依前法数至“甲”,该年的天干为“甲”。再推算地支:先用公元纪年除以12,再用所得余
In ancient China, with the years of dry branches, there were often problems in Chinese language teaching in middle schools and various kinds of language papers that needed to calculate the year of dry branches of a year in AD. Now we introduce a simple and scientific method of calculation. The first method of calculating heavenly stems is to use the last digit (the single digit) of the AD year minus 3 or plus 7, and the number is to count from the first digit of Tianyu to the number of digits in the Tiangan order. The Heavenly Stem is the “dry” of the AD. For example, in 1911, the single digit was 1 and the rejection was 1 plus 7 to get 8, starting from the first position of the stem to the 8th position (A, B, D, G, and G). At that time, the year of the branch was calculated to be 1911 AD. The Heavenly Stem is “Xin”, and as in 1641, the single digit is 4, with 4 minus 3 being 1, according to the former method to “A”, and the Heavenly Heaven that year is “A”. Then extrapolate the earthly support: divide the first year of the year by 12 and use the remaining