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单击此处编辑母版标题样式,单击此处编辑母版文本样式,二级,三级,四级,五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,二级,三级,四级,五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,二级,三级,四级,五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,二级,三级,四级,五级,*,*,第,5,课时,100,以内数的顺序,JJ,一年级下册,三,100,以内数的认识,课后作业,探索新知,课堂小结,当堂检测,100,以内数的顺序,1,课堂探究点,2,课时流程,探究点,100,以内数的顺序,按数的顺序,在空格里填数。,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,1,49,后面的一个数是多少?,2,89,前面的一个数是多少?,3,和,71,相邻的是哪两个数?,4,六十几的两位数包括哪几个数?,61,、,62,、,63,、,64,、,65,、,66,、,67,、,68,、,69,50,88,70,、,72,小试牛刀,(选题源,典中点,),1,按顺序连点成画。,略。,2,按顺序数数。,(1) (2) (3),64,70,76,78,80,52,62,72,82,92,89,90,91,93,95,96,97,98,99,100,3,灵活数数。,(,从方框后面的数往后写哦,),(1),(2),(3),100,42,44,46,48,50,52,54,56,68,69,70,71,72,73,74,75,30,40,50,60,70,80,90,归纳总结:,1,100,的顺序表中,两位数的十位数字比行数少,1,,个位数字与列数相同。,夯实基础,(选题源于教材,P24,练一练),按要求填数。,453058607073,80858995100,个位上是,0,的数 个位上是,5,的数,50,到,90,之间的数,60 70,80 100,85 95,60 70,73 80 85 89,2. (1),写出个位上是,8,的两位数。,(2),写出十位上是,4,的两位数。,3.,找出每行数的规律,并按规律接着写出三个数。,2, 4, 6, 8, 10,(),,(,),(,),6,9, 12, 15, 18,( ),,(,),(,),5, 10, 15,20, 25,(),,(,),(,),18,(,本题答案不唯一。,),43,(,本题答案不唯一。,),12,14,16,21,24,27,30,35,40,在,2,、,5,、,7,三个数字中,任选两个组成两位数,可以组成,(),个不同的两位数。其中,最大的是,(,),最小的是(,)。,25,6,75,4,你能根据,1,100,的顺序表,填出下图中缺少的数吗?,易错辨析,(选题源于,典中点,或,点拨,),53,68,43,52,60,70,80,77,78,79,27,36,38,47,77,68,59,69,辨析:没有理解,1,100,的顺序表中,行与行、列与列之间数的关系,,填图中的数时“无从下笔”。,
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