千以内数的读法、写法（课件）

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1、授课者:杨芳明工作单位:马山县古零镇中心小学年龄:36教龄:16职称:小学高级教师:授课年级:二年级(1)班联系话:13768593118课题：千以内数的读法、写法一、创设情境，引入新课。一、点子图。①····································································································②······················································································

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4、····································⑨········································································································································································································1、数一数。⑩················································

5、····················································1、10个一是（十）2、10个十是（一百）3、10个一百是（一千）二、探究新知1、动手找一找（143）个点子图，你是什么数的，同桌讨论，等一下把你数的方法跟大家说一说。2、是由（）个百，（）个十和（）个一组成（）。3、还有一个方法可以写出来，用你桌子上的计数器拨出（143）。（一）数一数。143143千百十个位位位位读作：一百四十三（二）动手拨一拨。1、用计数器拨出（143）。写作：143（注意：写数、读数都是从最高位开始；用计数器拨数必须从个位拨。）三、学以致用。1、今天老

6、师请来了三位好朋友分别是：（周红：296杨一：402李利：670）周红:(296)千百十个写作：296杨一:(402)千百十个写作：402读作：四百零二读作：二百九十六李丽:(670)千百十个写作：670读作：六百七十2、读数。304709407340710500①你们会读这些数吗？②读完了这些数你发现每一组数的读法相同吗？【注意:中间有”0”必须读出来,末尾的0不读】3、写出下面各数(按要求完成)。1、296（　）（　　）（　　）（　　）（　　）。(注意：在“296”后面接着写5个数，是一个数一个数的数往后写)2、（　）（　　）（　　）（　　）（　　）402。(注意：在“40

7、2”前面接着写5个数，是一个数一个数的往前写)3、670（　）（　　）（　　）（　　）（　　）。(注意：在“670”后面接着写5个数，是十个十个往下数。)2972982993003014014024034044056806907007107204、拨数。①用计数器拨“999”。②什么把“999”变成一千呢？③一千从右往左数排在第几位④一千里面有多少个十？1000里面多少个一？板书课题：一千以内数的读法、写法四、全课总结。1、这节课我们学习了什么内容？2、读数、写数、拨数都要注意几个方面？