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,因数与倍数,2,、,5,的倍数的特征,百分数（二） 折扣,人教版 数学,五年级,下册,2,、,5,的倍数的特征,情境导入,探究新知,课堂小结,课后作业,因数与倍数,课堂练习,2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,情境导,入,返回,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,5,0,上表中哪些数是,5,的倍数,?,把它们圈出来。你发现了什么,?,探究新知,返回,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,2,4,6,8,0,上表中哪些数是,2,的倍数,?,把它们框起来。你发现了什么,?,返回,个位上是,0,、,2,、,4,、,6,、,8,的数,都是,2,的倍数,;,个位上是,0,或,5,的数,都是,5,的倍数。,2,的倍数,5,的倍数,返回,个位上是,0,、,2,、,4,、,6,、,8,的数,都是,2,的倍数,;,2,的倍数,是,2,的倍数的数叫作,偶数,。,不,是,2,的倍数的数,叫作,奇,数,。,2,a,2,a,1,返回,下面各数,哪些是,2,的倍数,?,哪些是,5,的倍数,?,哪些同时是,2,和,5,的倍数,?,返回,同时是,2,和,5,的倍数的数的个位上只能是,0,。,你,发现了什么,?,返回,按,要求填数。,1,2,3,35,78,90,96,14,27,61,5,奇数,偶数,2,1,3,35,78,90,96,14,27,61,5,课堂,练习,返回,4,15,7,0,9,在里填数字,使这个数是,5,的倍数。,0,5,0,5,0,5,0,9,返回,是,5,的倍数的,数个位,上只能是,0,或,5,。,五个连续的偶数的和是,80,其中最大的一个数是多少,?,答,:,最大的一个数是,20,。,805=16,16+4=20,a,a,2,a,4,a,4,a,2,返回,这堆糖果的块数是,2,和,5,的倍数。,一堆,糖果的块数大于,10,块且不,到,30,块,2,人或,5,人均分都刚好分完,这堆糖果最多有多少块,?,答：这堆糖果最多有,20,块。,10,20,返回,这节课你们都学会了哪些知识？,课堂小结,返回,1.,个位,上是,0,、,2,、,4,、,6,、,8,的数,都是,2,的,倍数。,2.,个位上是,0,或,5,的数,都是,5,的倍数。,课本：,第,11,页第,1,、,2,、,6,题,课后作业,返回,伴你成长,
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