二年级数学下册第7单元万以内数的认识万以内数的认识教案2新人教版.doc

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1万以内数的认识教学目的:1使学生能正确地数出 1000以内的物体个数,建立 10000以内数的概念。2理解 10个一千是一万,认识计数单位“万“。3会读写 10000以内数的组成,掌握数顺序表,理解数位的意义与作用。4发展学生的数感,培养学生的综合能力和创新精神。教学重点:认识 10000以内的数,掌握数的组成和数位顺序表。教学难点:理解数位的意义与作用。教学过程:一、读数导入南京长江大桥公路桥长 4589米,铁路桥长 6772米。二、探究新知(一)数数,认识计数单位“万”一个一个地数,10 个一是十。一十一十地数,10 个十是一百。一百一百地数,10 个一百是一千。一千、二千、三千、四千、五千、六千、七千、八千、九千、一万。一千一千地数,10 个一千是一万。(二)整理数位顺序表(三)在计数器上边拨珠边数数2(1)从一千起,一个一个地数到一千零二十。(2)从四千九百五十起,一十一十地数到五千零五十。(3)从八千五百起,一百一百地数到九千三百。(四)数的组成三、知识应用1下面是绘图纸的一部分。2. 有多少张明信片?3. 在计数器上表示出下面各数,并说一说它们的组成。六千三百八十,三千二百一十九,二千三百零八四、课堂作业作业:第 87页练习十七,第 24 题。3

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