數(shù)學一上《5以內(nèi)的減法》（新芽課教案）

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1、數(shù)學一上5以內(nèi)的減法（新芽課教案）數(shù)學 學科第 一 冊第 三 單元課題：減 法（一）授課教師： 吳 悠教學目標：知識：學生能初步理解減法的意義，認識減號，會讀減法算式。能力：學生的觀察能力和語言表達能力得到培養(yǎng)。情感：學生學習數(shù)學的積極性得到培養(yǎng)。重點：認識減法的意義，正確讀減法算式。難點：能準確表述減法算式的意義，會找被減數(shù)。教學環(huán)節(jié)：一。復習鋪墊。（3分）小游戲：復習5以內(nèi)數(shù)的分與合。（師生游戲）（設(shè)計意圖：利用知識的遷移為新知識做鋪墊。）二。創(chuàng)設(shè)情境，探究新知。（ 15分）（一）初步感知減法的意義，建立減法的概念。1.課件演示課本P26的情景動畫圖，創(chuàng)設(shè)情境導入新課。（引導學生認真觀察動

2、畫，并自己組織語言如何表述。）2.學生說說收集到的數(shù)學信息，并學會提出數(shù)學問題。（師根據(jù)學生回答的信息板書。）3.理解減法的含義。師：說一說，“飛走了”是什么意思？從幾個里面飛走了？小結(jié)：從總數(shù)里去掉一個部分，求剩下的部分，用減法計算。（板書課題：減法）（二）認識減法算式。1.提問：要求還有幾個氣球，該怎么列式？（板書：41=3）2.該怎么讀這個算式？（講解減號及讀法）（三）進一步理解減法的意義。說一說算式中的“4”“1”和“3”分別表示什么？（設(shè)計意圖：通過動畫情景引入新課，容易激發(fā)學生學習興趣，讓學生能夠通過自己的觀察，收集數(shù)學信息、表述信息、提出問題并解決問題。）三。鞏固梳理，拓展應(yīng)用。

3、（ 15分）任務(wù)：完成課本P26做一做及P28練習五T3。用“爭摘智慧金蘋果”的游戲，讓學生鞏固怎樣表述圖意及算式意思。（游戲中引導學生明確被減數(shù)。）（設(shè)計意圖：通過游戲的方式讓學生練習鞏固，可以讓課堂練習達到更好的效果。）四。課堂總結(jié)。（2分）今天學習了什么內(nèi)容？減法和我們之前學的加法有什么區(qū)別？（設(shè)計意圖：幫助學生構(gòu)建知識體系。）C29C91AFE4CED1B6C8795AD9C91AFE4CED1B6C8795AD91AFE4CED1B6C8795AD9C91FE4CED1B6C8795AD29C91AFEDD1B6C87D1B6C8795AD9C91AFE4CED1B6C8795AD9

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