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1、吨的认识,测量,一、复习导入,1（,1（,克,千克,二、认识1吨,1、感受10千克,10千克,提一提,二、认识1吨,2、感受25千克,25kg,抱一抱,二、认识1吨,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,25kg,二、认识1吨,3、感受1吨,10千
2、克,）个（ ）的物品重1吨,25kg,）个（ ）的同学重1吨,25kg,40,100,10kg,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,2,20,10,4,二、认识1吨,3、感受1吨,小 结,吨是比千克大的质量单位。计量比较重或大宗物品的质量，通常用吨做单位,在（ ）里填上合适的单位,蓝鲸约重50（,千克,吨,小狗重约5（,苹果重约230（,克,长颈鹿约高5（,米,载质量 1000kg,三、吨的应用,三、吨的应用,3吨,四、拓展提高,限重1吨,340kg,240kg,500kg,160kg,哪几个可以一起过桥,水深2米,4米 1200kg,3米 6000kg,五、课堂小结,这节课你知道了什么 感受最深的是什么
