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4 n8小數(一)4.02a
1.
4N8 小數(一)教案 日期:4 月
2 日 學生人數:30 範疇︰數 單元︰4N8 小數(一) 課題︰小數的認識(一) 課節︰1(40 分鐘) 學生已有知識︰ 1. 已有分數的概念。 2. 已有五位數的概念及其寫法和讀法。 3. 已有元和角的概念。 學習目標︰ 完成本課節後,學生能夠 1. 認識小數點。 2. 掌握小數是分數的另一寫法。 3. 掌握小數的寫法和讀法。 教學資源運用︰ 1. 黑板
2.
教學流程 時間 教學重點 教學活動內容
教學資源 引入階段 5' 以生活例子 引入小數的 概念。 黑板:8,12,463 提問:這些數我們會統稱為(學生:整數)。 然後再以價錢牌作引入,$5.9,$3.5,指出 這些我們稱為小數。 黑板 發展階段 15' 介紹小數點 講解小數是 分數的另一 寫法 小數的寫法 黑板:5.9 講解:小數點用作分隔整數和小數,小數點 前的是整數部分,小數點後的是小數部分。 再以元和角講解小數是分數的另一寫法。學 生已知 1 元 10 角,然後將 1 元平均分 10 份就是 10 角,其中一份是 1 角,以分數表 示: 1 10 元,以小數表示:0.1 元。 再以 2 角和 5 角作例子,由學生口頭回答, 老師引導學生。 黑板 10' 鞏固學習重 點 完成書內練習,老師巡視,並講解答案。 10’ 鞏固學習重 點 派發功課並講解較難題目。 總結階段 5' 整理及鞏固 學習重點 老師︰今天學了小數是分數的另一寫法,分 數 1 10 用小數表示可寫成(學生:0.1)。另外, 我們學了每個小數內都有小數點,小數點用 來分隔整數和小數,小數點前的是(學生: 整數部分),小數點後的是(學生:小數部 分)。 黑板
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