人教出版一学年数学下册-有趣的百数表.ppt

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1、有趣的百数表,执教：余燕鸣,快 来 和 数 打 招 呼,96,18,50,99,92,91,93,94,95,97,98,100,80 81 82,83 85 84,88 89 70 72,73 75 74 66 77 79 78,59 60 64 63 62 46 53 66 34 23 25,8 5 10 12 14 11 13 56 46 54 22 11,44 55 36,77 88 78 79,19 46 49 45 47 38 36 35,30 21 23,49 37 55,10 个 十 是 100,我 会 数 格 子,行,10 个 十 是 100,我 会 数 格 子,列,找规律,

2、找规律,找规律,77,找规律,77,找规律,11,91,2,22,82,13,33,73,4,44,64,15,55,6,46,66,8,28,88,19,99,10,17,37,77,写一写,十位是3的数,1,11,21,31,41,51,61,71,81,91,2,12,22,32,42,52,62,72,82,92,3,13,23,33,43,53,63,73,83,93,4,14,24,34,44,54,64,74,84,94,5,15,25,35,45,55,65,75,85,95,6,16,26,36,46,56,66,76,86,96,8,18,28,38,48,58,68,78

3、,88,98,9,19,29,39,49,59,69,79,89,99,10,20,30,40,50,60,70,80,90,100,7,17,27,37,47,57,67,77,87,97,个位是3的数,十位和个位相同的数,涂一涂,53,53,46,53,46,67,53,46,67,90,第1行,第2行,第3行,1,11,21,31,41,51,61,71,81,91,2,12,32,42,52,62,72,82,92,3,13,23,43,53,63,73,83,93,4,14,24,34,54,64,74,84,94,5,15,25,35,45,65,75,85,95,6,16,26,

4、36,46,56,76,86,96,8,18,28,38,48,58,68,78,98,9,19,29,39,49,59,69,79,89,10,20,30,40,50,60,70,80,90,100,7,17,27,37,47,57,67,87,97,22,33,44,55,66,88,99,77,合作交流,横 看,竖 看,斜 看,我问你答,90,我比八十九多1,我是( )。,我是鸭后面第6个数,我是( )。,我比企鹅的个数少1,我是( )。,我比企鹅的个数多1,我是( )。,96,95,97,考考你,考考你,20,30,40,60,70,80,90,63,64,65,67,68,70,考考

5、你,1,11,21,31,41,51,61,71,81,91,2,12,22,32,42,52,62,72,82,92,3,13,23,33,43,53,63,73,83,93,4,14,24,34,44,54,64,74,84,94,5,15,25,35,45,55,65,75,85,95,6,16,26,36,46,56,66,76,86,96,8,18,28,38,48,58,68,78,88,98,9,19,29,39,49,59,69,79,89,99,10,20,30,40,50,60,70,80,90,100,7,17,27,37,47,57,67,77,87,97,魔法框,学数表背口诀,行是横、列是竖； 行是十位，列是个； 遇到行，要减1； 遇到列，它不变； 第十列，行不变。,