千以内数的读法、写法（课件）

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····································································································③····································································································④····································································································⑤····································································································

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····································································································1、数一数。⑩

····································································································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。304

709

407340

710

500①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“402”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