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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,第二级,第三级,第四级,第五级,认识,100,以内的数,第,5,课时 100以内数的顺序,苏教版 数学 一年级 下册,1,通过自主探索、合作交流完成对“百数表”的整理，进一步认识,100,以内数的顺序，发现,100,以内数排序中的一些规律，了解数与数之间的联系，初步体会数的大小。,2,在学习活动中体验发现数的排列规律的过程，感受观察、比较的方法，获得相应的数学活动经验，并进一步发展数感。,3,在经历探索、发现的过程中，增强主动探索、与人交流的意识和创新意识，体会数学内部的固有联系。,【,重点,】,100,以内数的顺序。,【,难点,】,发现数按一定规则排列后相互之间的联系。,数娃娃们排成了整齐的方队参加运动会，有的数娃娃和小朋友捉起了迷藏，不见了。你能把它们找出来吗？,1,10,12,19,23,25,26,28,34,37,43,48,53,58,64,67,73,75,76,78,82,89,91,100,想一想，可以怎样填？自己先填一填，再和同桌交流。,1,10,12,19,23,25,26,28,34,37,43,48,53,58,64,67,73,75,76,78,82,89,91,100,你填对了吗？检查一下吧！,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,这就是百数表。百数表里藏着哪些规律呢？我们一起来找找吧！,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,横着选几行数读一读，你有什么发现？,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,横着选几行数读一读，你有什么发现？,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,横着看，第,2,行前九个数十位上都是,1,。,横着选几行数读一读，你有什么发现？,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,横着看，第,3,行前九个数十位上都是,2,。,横着选几行数读一读，你有什么发现？,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,横着看，第（ ）行前九个数十位上都是（ ）。,竖着选几行数读一读，你有什么发现？,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,竖着看，第,1,列的个位上都是,1,。,竖着选几行数读一读，你有什么发现？,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,竖着看，第,2,列的个位上都是,2,。,竖着选几行数读一读，你有什么发现？,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,竖着看，第,( ),列的个位上都是,( ),。,你还有什么发现？,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,横着看，相邻的两个数相差,1,。,竖着看，相邻的两个数相差,10,。,用上面的图形分别在左面的表里框出几个数，看看是哪几个。,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,试一试,右面框里另外的几个数各是多少？,试一试,15,23,16,25,26,13,22,24,33,1,你能按顺序填一填吗？,28,29,33,这些数是按从小到大的顺序排列的。,30,31,32,34,35,36,37,38,39,40,1,98,97,93,100,99,96,95,94,92,91,90,89,88,你能按顺序填一填吗？,这些数是按从大到小的顺序排列的。,2,（,1,） 比,69,大,1,的数是（ ）。,（,2,） 比,100,小,1,的数是（ ）。,（,3,）,40,比（ ）大,1,， 比（ ）小,1,。,填一填。,70,99,39,41,3,王医生从,1,号病人看起，现在要看,35,号病人。你知道王医生已经看过多少病人了吗？,35,号。,35 -,1, （人）,34,在百数表中，横行的两个数相差,1,，竖行的两个数相差,10,。,今天我们学习的什么内容？你有哪些收获？,1.,根据百数表填一填。,37,55,38,47,48,45,54,56,65,2.,小明看一本,58,页的故事书，他准备看第,46,页，他已经看了多少页？,46 -,1, （页）,45,29 +,1, （人）,30,3.小朋友们排队，小亮排在最后一个，他前面有29人。这一队一共有多少人？,
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