资源描述
,小数的意义和读写,苏教版小学数学五年级上册,米,分米,厘米,毫米,10,10,10,100,1000,元,角,分,10,10,100,10,1,0.1,10,3,0.3,4厘米、12厘米各是1米的几分之几?各是几分之几米?,100,7,0.07,100,11,0.11,1毫米等于几分之几米?40毫米、105毫米呢?你是怎样想的?,1000,3,0.003,1000,86,0.086,1000,160,0.160,0.04米,0.015米,0.3元,比较上面每组中的分数和小数,你能发现什么?想一想,还有没有位数更多的小数?在小组里进行交流。,米,元,分母是10、100、1000的分数都可以用小数表示。 一位小数表示十分之几,两位小数表示百分之几,三位小数表示千分之几,100,1,0.01,100,5,0.05,100,73,0.73,0.7,0.43,0.009,一个小数的小数部分含有几个数位,这个小数就是几位小数。 如0.3是一位小数,0.04是两位小数,0.007是三位小数。 显然,还有小数位数更多的小数。,读出下面各数,并说出各表示几分之几。,0.39,0.108,0.006,0.5,0.80,( ),( ),( ),( ),( ),( ),在括号里填上合适的小数。,0.3,0.256,0.021,0.8,0.37,0.02,通过本节课的学习,你有什么收获?还有什么问题?,课堂小结,
展开阅读全文