《数学数的顺序》PPT课件.ppt
数的顺序,任课老师:雨峰,按照数的顺序,在空格里填空,100以内数的顺序,23,34,12,1,28,37,19,25,26,67,78,100,91,73,64,43,53,48,58,75,76,10,按照数的顺序在空格里填数,88,1.给十位是3的数涂上绿色;个位是3的数涂上黄色;个位和十位数字相同的数涂上粉色。2.你从表里发现哪些有趣的排列?3.第4行第8个数是什么?4.55前面一个数是什么?,23,34,12,1,28,37,19,25,26,67,78,89,100,91,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,17,32,31,21,11,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,81,74,72,71,63,62,61,54,52,51,45,42,41,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,23,34,12,28,37,19,25,26,67,78,89,100,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,17,32,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,74,72,63,62,54,52,45,42,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,百数表,23,28,25,26,27,29,24,22,21,34,12,1,37,19,67,78,89,100,91,82,73,64,43,53,48,58,75,76,10,35,36,38,39,40,30,20,18,16,9,7,5,6,8,15,17,31,11,33,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,81,74,72,71,63,62,61,54,52,51,45,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,百数表,34,12,37,19,67,78,89,82,73,64,53,48,58,75,76,35,36,38,39,18,16,9,7,5,6,8,15,17,32,33,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,74,72,63,62,54,52,45,44,99,46,47,49,88,77,79,69,59,87,65,66,百数表,41,42,（2）最右边的数都是整十数。,23,34,12,1,28,37,19,25,26,67,78,89,100,91,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,32,31,21,11,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,81,74,72,71,63,62,61,54,52,51,45,42,41,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,23,34,12,28,37,19,25,26,67,78,89,100,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,32,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,74,72,63,62,54,52,45,42,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,百数表,竖着看：每一竖排个位上的数字都相同，十位上数字依次多1。,23,34,12,1,28,37,19,25,26,67,78,89,100,91,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,8,15,17,32,31,21,11,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,81,74,72,71,63,62,61,54,52,51,45,42,41,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,23,34,12,28,19,25,26,78,89,100,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,20,18,9,5,8,15,32,33,24,14,3,13,2,4,96,95,86,85,56,55,68,98,94,93,92,84,83,74,72,63,62,54,52,45,42,22,44,99,46,90,80,70,60,50,49,88,79,69,59,65,66,百数表,（2）最右边的数都是整十数。,22,23,34,12,1,28,37,19,25,26,67,78,89,100,91,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,17,32,31,21,11,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,81,74,72,71,63,62,61,54,52,51,45,42,41,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,23,34,12,28,37,19,25,26,67,78,89,100,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,17,32,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,74,72,63,62,54,52,45,42,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,百数表,斜着看：从左上方到右下方个位和十上数字都依次增加1，从右上方到左下方十位上数字依次增加1，个位上数字依次减少1。,竖着看：每一竖排个位上的数字都相同，十位上数字依次多1。,（2）最右边的数都是整十数。,23,34,12,1,28,37,19,25,26,67,78,89,100,91,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,17,32,31,21,11,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,81,74,72,71,63,62,61,54,52,51,45,42,41,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,23,34,12,28,37,19,25,26,67,78,89,100,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,17,32,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,74,72,63,62,54,52,45,42,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,百数表,23,34,12,1,28,37,19,25,26,67,78,89,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,17,32,31,21,11,33,24,14,3,13,2,4,86,85,56,55,57,68,94,92,84,83,81,74,72,71,63,62,61,54,52,51,45,42,41,22,44,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,23,34,12,28,37,19,25,26,67,78,89,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,17,32,33,24,14,3,13,2,4,86,85,56,55,57,68,94,92,84,83,74,72,63,62,54,52,45,42,22,44,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,百数表,个位上是5的数！,个位是0的数！,百数表,个位上是5的数！,个位上是5的数！,个位是0的数！,23,34,12,1,28,37,19,25,26,67,78,89,100,91,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,17,32,31,21,11,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,81,74,72,71,63,62,61,54,52,51,45,42,41,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,23,34,12,28,37,19,25,26,67,78,89,100,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,17,32,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,74,72,63,62,54,52,45,42,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,十位上是3的数！,十位上是5的数！,23,34,12,1,28,37,19,25,26,67,78,89,100,91,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,17,32,31,21,11,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,81,74,72,71,63,62,61,54,52,51,45,42,41,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,23,34,12,28,37,19,25,26,67,78,89,100,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,17,32,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,74,72,63,62,54,52,45,42,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,百数表,26,27,36,37,64,73,75,84,71,23,34,12,1,28,37,19,25,26,67,78,89,100,91,82,73,64,43,53,48,58,75,76,10,35,36,38,29,39,40,30,27,20,18,16,9,7,5,6,8,15,17,32,31,21,11,33,24,14,3,13,2,4,97,96,95,86,85,56,55,57,68,98,94,93,92,84,83,81,74,72,63,62,61,54,52,51,45,42,41,22,44,99,46,47,90,80,70,60,50,49,88,77,79,69,59,87,65,66,89,100,82,9,7,5,6,8,3,2,4,97,96,95,86,85,98,94,93,92,84,83,90,88,87,百数表,填空：,1,2,3,4,与99相邻的数是：（）、（）；,从1到9都是（）位数；,从（）到（）都是两位数；,最大的两位数是（），最小的两位数是（）。,98,100,一,10,99,99,10,99,10,86,86,86,28,你能说一说吗？,奶奶今年61岁,爷爷只比奶奶大一岁，爷爷今年多少岁？,（62）,一三班有36人去春游，他们选哪辆车合适？,45座,40座,38座,妈妈的岁数比30大，比35小，妈妈可能多少岁？,（31、32、33、34）你说对了吗？,一个数比48大，比55小，与50很接近，这个数是（）,A（47）,B（55）,C（54）,D（51）,D,按顺序填一填,28、29、（）、（）、（）,（）、（）、98、（）、96,（）、21、31、（）、（）、61,1、49和51中间的数是（）,2、和99相邻的两个数是（）和（）,（课堂作业）,谢谢大家 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