练习:
836÷4= 632÷3=
3、分层:
能独立完成的同学,独立完成
要和别人合作完成的同学,可以找人讨论完成;也可以先看看书上的方法,再来自己做一做。结果、方法汇报
4、竖式简化的写法
师:小朋友,小熊猫做了4道题,(出示:41页的第4题)这些竖式可以这样写吗?
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" width="470" height="147"/> 生:任何数减去0都等于这个数的本身,所以减0的这一步可以省略。
创设比赛情境,来进行练习。
师:现在每组桌上都有好多一样的题,请你们组员合作,来比一比哪一组在2分钟内算的题目最多最正确!
学生完成30页的练一练
三、巩固运用
1、师:小朋友学得这么好,让我们放松一下,去花棚走走吧!
花棚里这么多花,一共有254盆呢!如果每排放4盆,那么可以放多少排啊?
还剩下多少盆呢?
2、小组汇报,并把书上小兔的竖式计算过程,使学生进一步理解其中的算理。
问:三位数除以一位数的商为什么会是两位数呢?
得到:被除数最高位上的2除以4不够商1就要看被除数的前两位,商的最高位在十位上,商是一个两位数。
3、练习
从中选择2题来练一练
问:请你们仔细观察,这些题目都有怎样的共同点?
总结
问:通过今天的学习你有什么收获呢?
课后检测练习:
课后反思:
以上是《2019年沪教版三年级上册数学教案:<三位数被一位数除(三)>》的内容,更多沪教版三年级上册小学教学教案请关注新东方在线小学网。