五年级下册数学2-3-5的倍数特征.pptx

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,2,、,5,倍数特征,西师大版五年级数学上册,第1页,教学目标,1,、经历探索,2,、,5,倍数特征过程，了解,2,、,5,倍数特征，能判断一个数是,2,或,5,倍数。,2,、知道奇数、偶数含义，能判断一个数是奇数或偶数。,在观察、猜测和讨论过程中，提升探究问题能力。,第2页,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,倍数,第3页,2,倍数特征,能被,2,整除数是偶数,不能被,2,整除数是奇数。,个位上是,0,、,2,、,4,、,6,、,8,数，都能被,2,整除,第4页,73,、,56,、,84,、,233,、,140,、,555,、,600,奇 数,偶 数,第5页,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,倍数,第6页,5,倍数特征,个位上是,0,或者,5,数，都能被,5,整除,2,、,5,倍数公共特征,整数个位上是,0,，就是,2,、,5,共同倍数,第7页,28,、,35,、,40,、,55,、,10,、,84,、,95,、,78,、,53,、,90,2,倍数,5,倍数,第8页,摸出几能够和”,5”,组成,2,倍数,?,摸出几能够和”,5”,组成,5,倍数,口袋里有,09,数字卡片,数学游戏,第9页,谢谢观看,第10页,