资源描述
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,*,简单的计算,(,例,5,、例,6,),认识人民币,乌牛一小 厉,2014.4.6.,填一填,60,角,=,()元,50,分,=,()角,3,元,=,()角,4,角,=,(,),分,分()元,2,元,=(),分,300,分,=(),元,500,分,=(),角,=(),元,2.5,元,=(),元,(),角,0.8=,元,(),角,3.98,元,=(),元,(),角,(),分,6,5,30,40,2,200,3,50,5,2,5,8,3,9,8,()元()角,()元()角()分,()元()角,52,5,21,6,16,1,5,10,10,填一填,1,元,()角,1,角,()分,写出下面的钱数,1.2 0,元,元 角 分,1,元,2,角,0,分,35.9,元,元 角 分,35,元,9,角,0,分,人民币单位间的换算,12,1,元就是,10,角,,10,角,2,角,12,角。,怎样想呢?,1,元就是,1,个,10,角,,1,个,10,角,和,2,个,1,角合起来是,12,角。,先想:,1,元可以换成多少个,1,角?,想一想:,18,角()元()角,人民币单位间的换算,8,1,你们会填吗?,18,角可以分成,10,角,和,8,角,,,10,角就是,1,元,,1,元和,8,角合起来是,1,元,8,角。,5,元,5,角,=,()角,1.,55,28,1,4,6,9,你是怎么想的,?,55,1,元,10,角,5,元,50,角,50,角,5,角,55,角,5,元,5,角,=,()角,55,1,元,10,角,1,元就是,1,个,10,角,有几元就有,几个,10,角,5,元,5,角是,5,个,10,角和,5,个,1,角,合起来,元、角的加减法计算,5,8,13,(角),13,角,1,元,3,角,一,个蓝色的气球,5,角,一个红色的心形气球,8,角,它们一共,13,角,也就是,这些气球真漂亮啊!,单位名称,都是,“,角,”,,,可以直接计算。,1,元,10,角,10,6,4,(角),1,元就是,10,角,用,10,角减,6,角等于,元、角的加减法计算,这个问题用,减法解决。,单位名称不同时,要,先转化成相同的单位,名称,,再计算。,1,元,3,元,1,角,1,角,1,元,3,元,4,元,先计算,1,元,3,元,4,元,,4,元,再加,1,角等于,4,元,1,角。,进行人民币的计算时,一定要,注意单位名称呦,!,元、角的加减法计算,怎样计算呢?,做一做,39,2,6,1.,说一说你的想法。,3,元,30,角,,30,角,9,角,39,角。,1,元是,1,个,10,角,,3,元就是,3,个,10,角,,3,个,10,角和,9,个,1,角合起来就是,39,角。,26,角可以分成,2,个,10,角和,6,个,1,角,,2,个,10,角是,2,元,,6,个,1,角,是,6,角,也就是,2,元,6,角。,20,角,2,元,,26,角,2,元,6,角。,元、角、分的计算,单位相同直接相加减,,单位不相同,先要化成相同单位,再计算。,满,10,角要转化成,1,元。,满,10,分要转化成,1,角。,1元=()角,1角=()分,10角=()元,10分=()角,80分=()角,50角=()元,10,10,1,8,1,5,13角=()元()角,1元7角=()角,1,3,17,28,角,=,()元()角,36,角,=,()元()角,92,角,=,()元()角,76,角,=,()元(),角,83,角,=,()元()角,3,元,6,角,=,()角,4,元,9,角,=,()角,5,元,3,角,=,()角,2,元,7,角,=,()角,6,元,2,角,=,()角,2,8,3,6,9,2,7,6,8,3,36,49,53,27,62,0.71元,5.50元,4.25元,1.08元,7.00元,5元5角,4元2角5分,7角1分,1元零8分,7元,1.20,元,0.50,元,5,角,1,元,2,角,3元8角=()角,26角=()元()角,38,2,6,4,元,9,角,=,()角,37,角,=,(,)元()角,3,元,5,角,+3,角,=,()元()角,2,元,5,角,+5,角,=,()元()角,3,元,5,角,+8,元,=,()元()角,3,元,5,角,+6,角,=,()元()角,3,元,5,角,+1,元,3,角,=,()元()角,38,3,7,3,8,3,0,11,5,4,1,4,8,3,元,9,元,12,元,2,元,2,角,1,元,2,角,2,元,1,元,1,元,2.,做一做,3,元,6,元,5,角,2,元,5,角,6,元,5,角,2,元,5,角,5,元,拓展练习,1.,如果把一种蛋糕和一种饮料配成套餐,你喜欢怎样搭配?价格是多少?,8,元,7,元,5,角,9,元,5,角,9,元,5,元,6,元,3,元,6,元,2,元,5,角,5,角,5,元,3,元,3,元,6,元,5,角,5,元,2,元,5,角,2,元,拓展练习,2.,把这些套餐的价格按照从高到低的顺序排一排。,9,元,5,角,9,元,8,元,7,元,5,角,3,元,6,元,5,角,5,元,2,元,5,角,3,元,6,元,5,角,2,元,5,角,6,元,5,角,2,元,5,角,5,元,8,元,7,元,5,角,9,元,5,角,9,元,5,元,3,元,2.,18,元,18,元,2,元,18,元,2,元,先看清楚要求,再回答。,7,元,3,角,2,角,1,元,4,角,1,角,7,元,3,角,=,+=,元 角,7,3,7,元,5,角,2,角,7,元,7,元,5,角,3,角,6,元,1,元,2.,18,元,2,元,先看清楚要求,再回答。,7,元,3,角,2,角,2.,18,元,2,元,先看清楚要求,再回答。,7,元,3,角,2,角,14,角,1,元,4,角,1,元,5,角,1,角,1,元,4,角,1,角,14,角,1,元,4,角,3.,7,12,1,3,1,8,你是怎么想的?,9,角,2,角,=,()角,7,5,角,1,元,3,角,=,()元()角,1,8,5,角,3,角,
展开阅读全文