千以內(nèi)數(shù)的讀法、寫法（課件）

授課者:楊芳明

工作單位:馬山縣古零鎮(zhèn)中心小學(xué)

年齡:36教齡:16

職稱:小學(xué)高級教師:

授課年級:二年級(1)班聯(lián)系話題：千以內(nèi)數(shù)的讀法、寫法一、創(chuàng)設(shè)情境，引入新課。一、點(diǎn)子圖。①····································································································②····································································································③····································································································④····································································································⑤····································································································

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⑦····································································································⑧····································································································⑨····································································································

····································································································1、數(shù)一數(shù)。⑩

····································································································1、10個(gè)一是（十）2、10個(gè)十是（一百）3、10個(gè)一百是（一千）二、探究新知1、動手找一找（143）個(gè)點(diǎn)子圖，你是什么數(shù)的，同桌討論，

等一下把你數(shù)的方法跟大家說一說。2、是由（）個(gè)百，（）個(gè)十和（）個(gè)一組成（）。3、還有一個(gè)方法可以寫出來，用你桌子上的計(jì)數(shù)器撥出（143）。

（一）數(shù)一數(shù)。143143

千百十個(gè)位位位位

讀作：一百四十三（二）動手撥一撥。1、用計(jì)數(shù)器撥出（143）。寫作：143（注意：寫數(shù)、讀數(shù)都是從最高位開始；用計(jì)數(shù)器撥數(shù)必須從個(gè)位撥。）三、學(xué)以致用。1、今天老師請來了三位好朋友分別是：（周紅：296楊一：402李利：670）

周紅:(296)

千百十個(gè)寫作：296

楊一:(402)

千百十個(gè)寫作：402

讀作：四百零二讀作：二百九十六

李麗:(670)

千百十個(gè)寫作：670讀作：六百七十2、讀數(shù)。304

709

407340

710

500①你們會讀這些數(shù)嗎？②讀完了這些數(shù)你發(fā)現(xiàn)每一組數(shù)的讀法相同嗎？【注意:中間有”0”必須讀出來,末尾的0不讀】3、寫出下面各數(shù)(按要求完成)。1、296（）（）（）（）（）。(注意：在“296”后面接著寫5個(gè)數(shù)，是一個(gè)數(shù)一個(gè)數(shù)的數(shù)往后寫)

2、（）（）（）（）（）402。(注意：在“402”前面接著寫5個(gè)數(shù)，是一個(gè)數(shù)一個(gè)數(shù)的往前寫)

3、670（）（）（）（）（）。(注意：在“670”后面接著寫5個(gè)數(shù)，是十個(gè)十個(gè)往下數(shù)。)2972982993003014014024034044056806907007107204、撥