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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,*,正比例,北师大版六年级数学下册,教学目标,1.,结合丰富的实例，认识正比例。,2.,能根据正比例的意义，判断两个相关联的量是不是成正比例。,3.,利用正比例解决一些简单的生活问题，感受正比例关系在生活中的广泛应用。,一辆汽车按同样的速度行驶，行驶的时间和路程如下：,老师有,10,本书，借出的本数与剩余的本数：,时间,/,时,1,2,3,4,5,路程,/,千米,90,180,270,360,450,s,与,t,的比值,(,一定,),90,90,90,90,90,借出的本数,1,2,3,4,5,剩余的本数,9,8,7,6,5,借与剩的和（,一定,）,10,10,10,10,10,=v(,一定,),借,+,剩,=,总本数（,一定,）,时间,/,时,1,2,3,4,5,路程,/,千米,90,180,270,360,450,S,与,V,比值,(,一定,),90,90,90,90,90,正方形边长,/cm,正方形周长,/cm,正方形边长,/cm,正方形面积,/cm,2,借,+,剩,=,总本数（,一定,）,=v(,一定,),借出的本数,1,2,3,4,5,剩余的本数,9,8,7,6,5,借与剩的和,(,一定,),10,10,10,10,10,时间,/,时,1,2,3,4,5,路程,/,千米,90,180,270,360,450,S,与,V,比值,(,一定,),90,90,90,90,90,借出的本数,1,2,3,4,5,剩余的本数,9,8,7,6,5,借与剩的和,(,一定,),10,10,10,10,10,1,2,3,4,5,90,180,270,360,450,S,与,V,比值,(,一定,),90,90,90,90,90,1,2,3,4,4,8,12,16,c,与,a,比值,(,一定,),4,4,4,4,正方形边长,/cm,1,2,3,4,正方形面积,/cm,2,1,4,9,16,s,与,a,比值,(,不一定,),1,2,3,4,借,+,剩,=,总本数（,一定,）,=v(,一定,),=4(,一定,),=a(,不一定,),时间,/,时,正方形边长,/cm,路程,/,千米,正方形周长,/cm,借出的本数,1,2,3,4,5,剩余的本数,9,8,7,6,5,借与剩的和,(,一定,),10,10,10,10,10,/,千米,1,2,3,4,5,/,时,90,180,270,360,450,S,与,V,比值,(,一定,),90,90,90,90,90,/cm,1,2,3,4,/cm,4,8,12,16,c,与,a,比值,(,一定,),4,4,4,4,正方形边长,/cm,1,2,3,4,正方形面积,/cm,2,1,4,9,16,s,与,a,比值,(,不一定,),1,2,3,4,借,+,剩,=,总本数（,一定,）,=v(,一定,),=4(,一定,),=a(,不一定,),一个量增加,另一个量也增加,两个量的,比值,一定,时间,正方形边长,路程,正方形周长,质量,/,千克,10,9,8,7,6,5,应付钱数,/,元,20,18,16,14,12,10,一些人买同一种苹果，购买苹果的质量和应付钱数如下。,应付钱数,_,质量,=,单价（,一定,）,借出的本数,1,2,3,4,5,剩余的本数,9,8,7,6,5,借与剩的和,(,一定,),10,10,10,10,10,时间,/,时,1,2,3,4,5,路程,/,千米,90,180,270,360,450,S,与,V,比值,(,一定,),90,90,90,90,90,正方形边长,/cm,1,2,3,4,正方形周长,/cm,4,8,12,16,c,与,a,比值,(,一定,),4,4,4,4,正方形边长,/cm,1,2,3,4,正方形面积,/cm,2,1,4,9,16,s,与,a,比值,(,不一定,),1,2,3,4,借,+,剩,=,总本数（,一定,）,=v(,一定,),=4(,一定,),=a(,不一定,),时间,/,时,1,2,3,4,5,路程,/,千米,90,180,270,360,450,S,与,V,比值,(,一定,),90,90,90,90,90,正方形边长,/cm,1,2,3,4,正方形周长,/cm,4,8,12,16,c,与,a,比值,(,一定,),4,4,4,4,=v(,一定,),=4(,一定,),全课小结,谈谈这节课的收获！,
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