,5的组成,课前导入,探究新知,课堂小结,课后作业,15的认识和加减法,课堂练习,3,课前导入,5 个 放在两个 里,有几种放法?,2,探究新知,5被分成了几和几。,5,1,4,5,4,1,3,5还能分成几和几。,5,2,3,5,3,2,4,5的组成有4种。,5,1,2,3,2,练一练,6,填一填。,课堂练习,5,3,2,7,想一想。,5,4,1,5能分成几和1?,8,想一想。,几和几组成几?,5,2,3,9,涂一涂,填一填。,5,1,4,5,2,3,10,涂一涂,填一填。,5,3,2,5,4,1,11,这节课你们都学会了哪些知识?,课堂小结,5的组成有4种。,12,1.从教材课后习题中选取; 2.从课时练中选取。,课后作业,13,