數(shù)學(xué)一上《5以內(nèi)的減法》（新芽課教案）

1、數(shù)學(xué)一上5以內(nèi)的減法（新芽課教案）數(shù)學(xué) 學(xué)科第 一 冊(cè)第 三 單元課題：減 法（一）授課教師： 吳 悠教學(xué)目標(biāo)：知識(shí)：學(xué)生能初步理解減法的意義，認(rèn)識(shí)減號(hào)，會(huì)讀減法算式。能力：學(xué)生的觀察能力和語言表達(dá)能力得到培養(yǎng)。情感：學(xué)生學(xué)習(xí)數(shù)學(xué)的積極性得到培養(yǎng)。重點(diǎn)：認(rèn)識(shí)減法的意義，正確讀減法算式。難點(diǎn)：能準(zhǔn)確表述減法算式的意義，會(huì)找被減數(shù)。教學(xué)環(huán)節(jié)：一。復(fù)習(xí)鋪墊。（3分）小游戲：復(fù)習(xí)5以內(nèi)數(shù)的分與合。（師生游戲）（設(shè)計(jì)意圖：利用知識(shí)的遷移為新知識(shí)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(dòng)畫圖，創(chuàng)設(shè)情境導(dǎo)入新課。（引導(dǎo)學(xué)生認(rèn)真觀察動(dòng)

2、畫，并自己組織語言如何表述。）2.學(xué)生說說收集到的數(shù)學(xué)信息，并學(xué)會(huì)提出數(shù)學(xué)問題。（師根據(jù)學(xué)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(gè)里面飛走了？小結(jié)：從總數(shù)里去掉一個(gè)部分，求剩下的部分，用減法計(jì)算。（板書課題：減法）（二）認(rèn)識(shí)減法算式。1.提問：要求還有幾個(gè)氣球，該怎么列式？（板書：41=3）2.該怎么讀這個(gè)算式？（講解減號(hào)及讀法）（三）進(jìn)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(jì)意圖：通過動(dòng)畫情景引入新課，容易激發(fā)學(xué)生學(xué)習(xí)興趣，讓學(xué)生能夠通過自己的觀察，收集數(shù)學(xué)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(xí)五t3。用“爭摘智慧金蘋果”的游戲，讓學(xué)生鞏固怎樣表述圖意及算式意思。（游戲中引導(dǎo)學(xué)生明確被減數(shù)。）（設(shè)計(jì)意圖：通過游戲的方式讓學(xué)生練習(xí)鞏固，可以讓課堂練習(xí)達(dá)到更好的效果。）四。課堂總結(jié)。（2分）今天學(xué)習(xí)了什么內(nèi)容？減法和我們之前學(xué)的加法有什么區(qū)別？（設(shè)計(jì)意圖：幫助學(xué)生構(gòu)建知識(shí)體系。） tgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2ohum32wgeauwydiawgmer4i30ka1dkaghn3xtkknbycudxqa7f

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