数的顺序_比较大小37p.ppt

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,*,数的顺序、比较大小,百 十 个,从右边起，第一位是,_,位,第二位是,_,位,第三位是,_,位,个,十,百,1 0 0,看图读数：,46,读作：四十六,64,读作：六十四,看图读数：,58,读作：五十八,72,读作：七十二,看图读数：,88,读作：八十八,99,读作：九十九,看图读数：,100,读作：一百,看图写数：,93,写作：,九十三,67,六十七,看图写数：,42,写作：,四十二,24,二十四,看图写数：,百,十,个,写作：,一百,1,0,0,看图写数：,九十三,六十七,百,十,个,9,3,百,十,个6,7,看图写数：,四十二,二十四,百,十,个,4,2,百,十,个,2,4,怎样读数写数？,读数和写数，,都从高位起。,看图写数：,100,写作：,一百,7,按照数的顺序，在空格里填数,2,4,6,8,10,11,13,15,17,19,22,28,33,37,44,46,55,64,66,73,82,88,91,99,7,按照数的顺序，在空格里填数,2,4,6,8,10,11,13,15,17,19,22,28,33,37,44,46,55,64,66,73,82,88,91,99,7,按照数的顺序，在空格里填数,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,1617,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,给,十,位,是,3,的,数,涂,上,绿,色,7,按照数的顺序，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,给,个,位,是,3,的,数,涂,上,黄,色,7,按照数的顺序，在空格里填数,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,9697,98,99,100,给,个,位,和,十,位,数,字,相,同,的,数,涂,上,粉,色,7,按照数的顺序，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,还,有,哪,些,有,趣,的,排,列,？,数的顺序,问：,1,、第,2,行第七个数是,17,，第,3,行第,9,个数是多少？第,8,行第,5,个数呢？,2,、第,6,行第七个数是多少？第,9,行第,9,个数是多少？,29,75,57,89,数的顺序,问：,1,、,29,是第,行第,个数，,76,是第,行第,个数。,92,是第,行第,数。,8,9,3,6,10,2,3,、,55,前面一个数是多少？后面一个数呢？,54,56,百,十,个,百,十,个,39,45,3853,比较两位数,先看十位上的数，十位上,的数字大这个数就大。,4928,8668,57 70,18 21,28 26,3835,比较两位数,如果十位上的数字相同，就看个位，个位上的数字大这个数就大。,4946,8689,二、练习。,58 53,用手势表示 里应填,“,”,、,“,”,还是,“,=,”,？,72 77,96 98,在,里填上“”、“”或“”,48,45,68,78,69,69,57,56,80,90,98,89,填一填：,38 49 61 56 74,51 24 90 85,大于,60,的数（）,小于,60,的数（）,把数字正确的填在（）里。,38 58 79 98 60,（）（）（）（）（）,38,5860,79,98,52 72,46,48,70 86,12,36 50,98,小朋友，你们好，你知道我是谁吗？,14,12,36 50,98,14,52 72,46,48,70 86,(1),正方形里最大的数是我,我是,.,小朋友，你们好，你知道我是谁吗？,98,12,36 50,98,14,52 72,46,48,70 86,(1),正方形里最大的数是我,我是,.,小朋友，你们好，你知道我是谁吗？,(2),我在圆和三角形里,比,80,大,我是,.,98,86,12,36 50,98,14,52 72,46,48,70 86,(1),正方形里最大的数是我,我是,.,小朋友，你们好，你知道我是谁吗？,(2),我在圆和三角形里,比,80,大,我是,.,(3),我在正方形,圆和三角形里,我是,.,98,70,86,12,36 50,98,14,52 72,46,48,70 86,(1),正方形里最大的数是我,我是,.,小朋友，你们好，你知道我是谁吗？,(2),我在圆和三角形里,比,80,大,我是,.,(3),我在正方形,圆和三角形里,我是,.,(4),我在正方形和圆里,比,50,小,我是,.,98,70,86,48,