,整十数加、减整十数,情境导入,探究新知,课堂小结,课后作业,100以内的加法和减法（一）,课堂练习,4,1,40座,30座,情境导入,小朋友们去郊游，准备了这两辆车！,返回,40座,30座,探究新知,返回,70,返回,40,返回,5,1.,90,40,50,90,50,90,40,50,课堂练习,返回,6,5,50,2.,4,40,9,90,8,80,返回,7,3.,50,80,10,70,30,返回,8,40,60,10,40,46,3.,返回,9,60+30 =,90,90-70 =,20,20+40 =,60,60-20 =,40,30+30 =,60,70-10 =,60,80-50+7 =,37,10+80+6 =,96,30+70-40 =,60,4.,10,20,20,40,（个）,5.,返回,11,整十数加、减整十数的方法：,1.想数的组成。,2.想一位数加、减一位数。,课堂小结,这节课你们都学会了哪些知识？,返回,补充习题： 第22页,课后作业,返回,
