计,结构图 (2)

,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,靖边三小 马林秀,三年级数学上册（北师大版）,年 月 日,有个宝贝真稀奇身穿三百多件衣每天都要脱一件等到年底剩张皮（打一物）,每年各月份天数记录表,月份,年份,1,月,2,月,3,月,4,月,5,月,6,月,7,月,8,月,9,月,10,月,11,月,12,月,合计,2011,年,2012,年,天数,小组合作记录表,每年各月份天数记录表,月份,年份,1,月,2,月,3,月,4,月,5,月,6,月,7,月,8,月,9,月,10,月,11,月,12,月,合计,2011,年,31,28,31,30,31,30,31,31,30,31,30,31,365,2012,年,31,29,31,30,31,30,31,31,30,31,30,31,366,天数,2011,年总天数的计算,1,月,2,月,3,月,4,月,5,月,6,月,7,月,8,月,9,月,10,月,11,月,12,月,合计,2011,年,31,28,31,30,31,30,31,31,30,31,30,31,3012,7,2,360,7,2,367,2,365,（天）,365,天数,月份,年份,317,304,28,217,120,28,337,28,365,（天）,计算结果,计算方案,2,计算方案,1,月份,年份,1,月,2,月,3,月,4,月,5,月,6,月,7,月,8,月,9,月,10,月,11,月,12,月,2005,年,2006,年,2007,年,2008,年,2009,年,2010,年,2011,年,2012,年,天数,2005,2012,年各月份天数记录表,31,31 28 31 30 31 30 31,31,30 31 30 31,31 29 31 30 31 30 31,31,30 31 30 31,31 28 31 30 31 30 31,31,30 31 30 31,31 28 31 30 31 30 31,31,30 31 30 31,31 28 31 30 31 30 31,31,30 31 30 31,31 29 31 30 31 30 31,31,30 31 30 31,28,31,30,31,30,31,31,30,31,30,31,31,28,31,30,31,30,31,31,30,31,30,31,月份,年份,1,月,2,月,3,月,4,月,5,月,6,月,7,月,8,月,9,月,10,月,11,月,12,月,2005,年,31,28,31,30,31,30,31,31,30,31,30,31,2006,年,31,28,31,30,31,30,31,31,30,31,30,31,2007,年,31,28,31,30,31,30,31,31,30,31,30,31,2008,年,31,29,31,30,31,30,31,31,30,31,30,31,2009,年,31,28,31,30,31,30,31,31,30,31,30,31,2010,年,31,28,31,30,31,30,31,31,30,31,30,31,2011,年,31,28,31,30,31,30,31,31,30,31,30,31,2012,年,31,29,31,30,31,30,31,31,30,31,30,31,天数,大月和小月,1,月、,3,月、,5,月、,7,月、,8,月、,10,月和,12,月都是,31,天，叫,大月,。,4,月、,6,月、,9,月和,11,月都是,30,天，叫,小月,。,2,月是,28,或,29,天，它是个,特殊的月份,。,一,二,三,四,五,六,七,八,九,十,十二,十一,拳头记忆法,七个大月心中装，,七前单数七后双。,二月是个特殊月，,其他个月是小月。,顺口溜记忆法：,一三五七八十腊，,三十一天永不差。,四六九和十一月，,三十天整不变化。,闰年二月二十九，,平年二月二十八。,歌谣记忆法：,下面哪些年份的二月是,28,天，哪些年份的二月又是,29,天？,年份,二月天数,1997,1998,1999,2000,2001,2002,2003,2004,28,28,28,29,28,28,28,29,19974=499 1,19984=499 2,19994=499 3,20004=500,20014=500 1,20024=500 2,20034=500 3,20044=501,月份,年份,1,月,2,月,3,月,4,月,5,月,6,月,7,月,8,月,9,月,10,月,11,月,12,月,合计,2005,年,31,28,31,30,31,30,31,31,30,31,30,31,2006,年,31,28,31,30,31,30,31,31,30,31,30,31,2007,年,31,28,31,30,31,30,31,31,30,31,30,31,2008,年,31,29,31,30,31,30,31,31,30,31,30,31,2009,年,31,28,31,30,31,30,31,31,30,31,30,31,2010,年,31,28,31,30,31,30,31,31,30,31,30,31,2011,年,31,28,31,30,31,30,31,31,30,31,30,31,2012,年,31,29,31,30,31,30,31,31,30,31,30,31,天数,一般来说，每四年有一个闰年,365,365,366,365,365,365,366,365,练习,判断下列年份是平年还是闰年,年份,方 法,1949,2003,2008,1900,找闰年,19494=487,1,平年,20034=500,3,平年,20084=502,闰年,平年,19004=475,日,一,二,三,四,五,六,1,初二,2,世界湿地日,3,初四,4,立春,5,初六,6,初七,7,初八,8,初九,9,初十,10,国际气象节,11,十二,12,十三,13,十四,14,元宵节,15,十六,16,十七,17,十八,18,十九,19,雨水,20,廿一,21,廿二,22,廿三,23,廿四,24,廿五,25,26,27,28,1900,年二月月,历,平年和闰年,一年是,365,天的，叫平年。（,2,月份天数是,28,天）,一年是,366,天的，叫闰年。（,2,月份天数是,29,天）,想一想,2000,年是平年还是闰年？,1900,年是平年还是闰年？,2000400,5,闰年,1900400,4,300,平年,年份数（整百年）,400,整数,闰年,年份数（整百年）,400,整数,平年,小提示：,问题,1,：,问题,2,：,智力闯关,第一关：口答,、一年有,(),个月。,、,1,、,3,、,5,、,7,、,8,、,10,、,12,月每月有,(),天。,、,4,、,6,、,9,、,11,月每月有,(),天。,、平年,2,月有,(),天，闰年,2,月有,(),天。,、平年全年有,(),天，闰年全年有,(),天。,12,31,30,28,29,365,366,第二关：判断,1,、,一年中有,6,个大月，,6,个小月。（,）,2,、,8,月,30,日后一天是,9,月,1,日。（,）,3,、,头一年2月29日爸爸去了一次北京，第二年,2月29日又去了一次北京。,（,）,4,、,2050,年有,365,天。（）,5,、一般来说，每,4,年里有,1,个闰年。（）,2011,年的,7,、,8,月共,62,天,。,我都是在舅舅家,淘气的日记,过的，舅舅是,1979,年,2,月,29,日出生的。我们过得,很开心，只是舅妈不在家，她,6,月,31,日就出差了，,9,月,31,日才回来，她答应今年,10,月,30,日来看我，,真巧，过了,10,月,30,日就是,11,月,1,日了，那天是我,的生日。,第三关：智慧题,1.,小,强满,12,岁的时候，只过了,3,个生日。猜一猜他是哪一天生的？,2.,小丽在奶奶家连续住了两个月，她可能在奶奶家住了多少天？,作业,2013,年是什么年？,请你在这一年中挑一个你喜欢的月份，制作一个月历，然后和万年历对照一下，看谁做得更精美。,再见,靖边第三小学,课件制作：马林秀,