最新滬教版五四制八年級(jí)數(shù)學(xué)上冊(cè)《正比例函數(shù)》1教學(xué)設(shè)計(jì)-評(píng)獎(jiǎng)教案

1、18.2教學(xué)標(biāo)過(guò)現(xiàn)實(shí)關(guān)義斷兩個(gè)變數(shù)關(guān)數(shù)概學(xué)會(huì)數(shù)數(shù)發(fā)學(xué)習(xí)積極進(jìn)認(rèn)識(shí)數(shù)與現(xiàn)實(shí)關(guān).教學(xué)難數(shù)概數(shù)數(shù)課教學(xué)設(shè)計(jì)創(chuàng)設(shè)情境，引出新知艷觀察分析，探究新知鉉師生互動(dòng)，運(yùn)用新知反饋小結(jié)，深化新知教學(xué)過(guò)設(shè)計(jì)創(chuàng)設(shè)1營(yíng)業(yè)額與筆數(shù)值5=2.52125=2.51營(yíng)業(yè)額與筆數(shù)值5=2.52125=2.5512.5r=2.5營(yíng)業(yè)額與筆數(shù)值3營(yíng)業(yè)額與筆數(shù)值筆單2.5/1銷(xiāo)種號(hào)筆銷(xiāo)況記錄筆數(shù)25431015營(yíng)業(yè)額512.5107.52537.5學(xué)們給條你么設(shè)筆數(shù)為x(x數(shù))應(yīng)營(yíng)業(yè)額為y么y=2.5為y=2.5x.設(shè)邊長(zhǎng)為xx0),長(zhǎng)為y么y=4x,為4長(zhǎng)隨邊長(zhǎng)變變.概并書(shū)兩個(gè)變組對(duì)應(yīng)值值個(gè)數(shù)這個(gè)數(shù)么說(shuō)這兩個(gè)變數(shù)學(xué)兩個(gè)變xyy=k

2、為y=kx(x0)k數(shù).說(shuō)學(xué)學(xué)階學(xué)過(guò)關(guān)過(guò)簡(jiǎn)單導(dǎo)學(xué)從兩個(gè)變間關(guān)來(lái)學(xué)難兩個(gè)變xy義.觀1議議題兩個(gè)變復(fù)復(fù)A4紙1張0.4計(jì)費(fèi)變復(fù)紙張數(shù)x張與費(fèi)y.ABCD邊長(zhǎng)為6P邊BC變BP長(zhǎng)x與ABP積S.3圓積隨徑變變變圓積A與該圓徑r.4從11處1氣溫6攝氣溫25C11h氣溫tCh()T(C)h()T(C)11411035變時(shí)2925201510.5IbLLILill0.123456789101112-10-15-20-25-30-35-40-458237176115541372311910522學(xué)開(kāi)進(jìn)觀3匯報(bào)結(jié)你怎么2學(xué)開(kāi)進(jìn)觀3匯報(bào)結(jié)你怎么4兩個(gè)變說(shuō)數(shù).們節(jié)課來(lái)研桌討論.個(gè)變數(shù).書(shū)課題說(shuō)來(lái).個(gè)變數(shù).概并

3、書(shū)義實(shí)數(shù)數(shù)y=kx(k義實(shí)數(shù)數(shù)y=kx(k數(shù))TOC o 1-5 h z數(shù)數(shù)k數(shù).數(shù)義實(shí)數(shù).說(shuō)過(guò)個(gè)問(wèn)題討論讓學(xué)進(jìn)認(rèn)識(shí)兩個(gè)變達(dá)時(shí)變值圍實(shí)數(shù)并調(diào)k數(shù).師動(dòng)運(yùn)數(shù)x變哪4xy=-4y=7x44xy=-4y=7x4y=7l4x+2.721數(shù)y=-4x,說(shuō)y與x間數(shù)并當(dāng)變x別-5-203時(shí)數(shù)值.32yx數(shù)y與x間數(shù)并寫(xiě)數(shù)32yx數(shù)y與x間數(shù)并寫(xiě)數(shù)當(dāng)x=3時(shí)y=24.數(shù)義.1啟發(fā)學(xué)討論你認(rèn)為數(shù)么怎樣數(shù)2匯報(bào)討論結(jié)數(shù)關(guān)鍵個(gè)數(shù).設(shè)數(shù)為y=kx(k0)x=3y=24kx=3y=24k值.書(shū)學(xué)討論結(jié)數(shù).討論結(jié)這種稱(chēng)為數(shù)兩個(gè)變組對(duì)應(yīng)值書(shū)學(xué)討論結(jié)數(shù).討論結(jié)這種稱(chēng)為數(shù)兩個(gè)變組對(duì)應(yīng)值說(shuō)題1讓學(xué)認(rèn)識(shí)數(shù)會(huì)數(shù)數(shù)時(shí)鞏數(shù)值概數(shù)值.題2數(shù)兩個(gè)變組對(duì)應(yīng)值這個(gè)數(shù)這個(gè)數(shù)數(shù).過(guò)題讓學(xué)從認(rèn)識(shí)并會(huì)數(shù)個(gè)數(shù)個(gè)數(shù)個(gè)獨(dú)條.饋結(jié)1你么獲2你覺(jué)怎樣數(shù)學(xué)習(xí)訓(xùn)練與學(xué)習(xí)評(píng)議1斷問(wèn)題:兩個(gè)變?yōu)槊?為數(shù)與數(shù).2數(shù)變?yōu)閿?shù)與.3個(gè)數(shù)變個(gè)數(shù)與它們積.4長(zhǎng)它長(zhǎng)與它邊長(zhǎng).齡.2哪13間習(xí)題數(shù)x變哪數(shù)為么x2y=5