,做个百数表,返回,情境导入,探究新知,课堂小结,课后作业,课堂练习,北师大版 数学 一年级 下册,做个百数表,生活中的数,3,情境导入探究新知课堂小结课后作业课堂练习北师大版 数学,看一看,填一填。,2,3,4,5,6,7,8,9,11,13,14,15,16,17,18,20,21,22,24,25,26,27,29,30,31,32,33,35,36,38,39,40,41,42,43,44,47,48,49,50,51,52,53,54,57,58,59,60,61,62,63,65,66,68,69,70,71,72,74,75,76,77,79,80,81,83,84,85,86,87,88,90,92,93,94,95,96,97,98,99,情境导入,看一看,填一填。2345678911131415161718,你发现了什么?,2,3,4,5,6,7,8,9,11,13,14,15,16,17,18,20,21,22,24,25,26,27,29,30,31,32,33,35,36,38,39,40,41,42,43,44,47,48,49,50,51,52,53,54,57,58,59,60,61,62,63,65,66,68,69,70,71,72,74,75,76,77,79,80,81,83,84,85,86,87,88,90,92,93,94,95,96,97,98,99,横着看每一行,(除最后一列),,十位数相同,个,位都增加,1,。,探究新知,你发现了什么?23456789111314151617182,你发现了什么?,2,3,4,5,6,7,8,9,11,13,14,15,16,17,18,20,21,22,24,25,26,27,29,30,31,32,33,35,36,38,39,40,41,42,43,44,47,48,49,50,51,52,53,54,57,58,59,60,61,62,63,65,66,68,69,70,71,72,74,75,76,77,79,80,81,83,84,85,86,87,88,90,92,93,94,95,96,97,98,99,竖着看每一列,,个位数相同,十,位都增加,1,。,你发现了什么?23456789111314151617182,你发现了什么?,2,3,4,5,6,7,8,9,11,13,14,15,16,17,18,20,21,22,24,25,26,27,29,30,31,32,33,35,36,38,39,40,41,42,43,44,47,48,49,50,51,52,53,54,57,58,59,60,61,62,63,65,66,68,69,70,71,72,74,75,76,77,79,80,81,83,84,85,86,87,88,90,92,93,94,95,96,97,98,99,斜着看,,每个数十位上的,数和个位上的数,相差的数相同。,你发现了什么?23456789111314151617182,想一想,填一填。,22,32,33,68,59,69,79,70,56,66,76,57,77,58,68,78,想一想,填一填。2232336859697970566676,你有什么发现?,百数表中每一行相邻两个数相差,1,。,每一列相邻两个数相差,10,。,你有什么发现?百数表中每一行相邻两个数相差1。每一列相邻两个,小熊写门牌号。,30,31,80,79,课堂练习,小熊写门牌号。30318079课堂练习,看一看,填一填。,加,2,36,38,40,加,10,90,100,60,50,看一看,填一填。加2363840加10901006050,想一想,填一填。,29,48,37,39,47,41,30,32,50,52,84,86,75,95,74,76,94,96,想一想,填一填。2948373947413032505284,百数表中,每一行相邻的两个数,相差,1,;,每一列相邻两个数,相差,10,。,课堂小结,这节课你们都学会了哪些知识?,百数表中,每一行相邻的两个数相差1;课堂小结这节课你们,课后作业,1.,从教材课后习题中选取;,2.,从课时练中选取。,课后作业1.从教材课后习题中选取;,历史故事成语,赠品 不喜欢可以删除,历史故事成语赠品 不喜欢可以删除,13,一、四面楚歌,项羽,比喻陷入四面受敌,处于孤立无援的窘迫境地。,一、四面楚歌项羽比喻陷入四面受敌,处于孤立无援的窘迫境地,14,煮豆燃萁,曹植,七步诗,煮豆燃豆萁,,豆在釜中泣,,本是同根生,,相煎何太急?,煮豆燃萁曹植七步诗,15,魏武帝曹操的第四个儿子曹植,和曹丕是同母兄弟,从小聪明,深受得曹操的宠爱。,曹操的次子曹丕做了皇帝后,常想借口除掉曹植。一次,他为难曹植,命令曹植在走七步路的时间内作出一首诗,并要以兄弟为题,但诗内不许出现兄弟二字,不然就要被处死。曹植被迫答应。七步还没走完,曹植的诗已吟出来了:煮豆燃豆箕,豆在釜中泣。本是同根生,相煎何太急!曹丕听后,又惭愧又心酸,只得罢休。后来,曹丕对曹植的监视迫害并未减少,曾经六次变更其爵位,使其三次迁徙封地。,这个成语比喻,骨肉间自相残害,。,魏武帝曹操的第四个儿子曹植,和曹丕是同母兄弟,从小聪明,,16,