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1、列方程解決稍復(fù)雜的分?jǐn)?shù)除法問(wèn)題Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.根據(jù)題中的信息說(shuō)說(shuō)分?jǐn)?shù)的意義,再說(shuō)出數(shù)量中的相等關(guān)系,用代數(shù)式表示黃花朵數(shù)。紅花朵數(shù)×=黃花朵數(shù)25紅花朵數(shù):黃花朵數(shù):25紅花朵數(shù)的251、紅花有朵,黃花朵數(shù)是紅花的。25“1”朵25黃花有()朵。Evaluationonly.CreatedwithAspose.Slidesfo
2、r.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.1、根據(jù)題中的信息說(shuō)說(shuō)分?jǐn)?shù)的意義,再說(shuō)出數(shù)量中的相等關(guān)系楊樹(shù)棵數(shù):柳樹(shù)棵數(shù):是楊樹(shù)棵數(shù)的15“1”楊樹(shù)棵數(shù)+多的棵數(shù)=柳樹(shù)棵數(shù)楊樹(shù)棵數(shù)×(1+)=柳樹(shù)棵數(shù)15如果楊樹(shù)有棵,那么柳樹(shù)比楊樹(shù)多的有()棵。15柳樹(shù)有()棵15+或(1+)棵25(1)、楊樹(shù)有棵,柳樹(shù)棵數(shù)比楊樹(shù)多。15棵Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientPr
3、ofile5.2.0.0.Copyright2004-2011AsposePtyLtd.(1)六月份比七月份少的產(chǎn)量()臺(tái)。(2)七月份產(chǎn)量是()臺(tái)。根據(jù)題中的信息說(shuō)說(shuō)分?jǐn)?shù)的意義,再填空。1414(1)14或(2)、六月份生產(chǎn)臺(tái),六月份比七月份少的。14“1”七月份:少14生產(chǎn)臺(tái)六月份:Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.2、根據(jù)題意,寫(xiě)出數(shù)量中
4、的相等關(guān)系,列出方程。紅花朵數(shù)×=黃花朵數(shù)25紅花朵數(shù):黃花朵數(shù):25紅花朵數(shù)的黃花有20朵,黃花朵數(shù)是紅花的。25“1”朵紅花有多少朵?20朵解:設(shè)紅花有朵。25=20Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.航模組有多少人?Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5
5、.2.0.0.Copyright2004-2011AsposePtyLtd.美術(shù)組有25人,美術(shù)組人數(shù)比航模組多。航模組有多少人?14航模組:美術(shù)組:人?人25人多14航模組的1414人航模組人數(shù)+多的人數(shù)=美術(shù)組人數(shù)航模組人數(shù)×(1+)=美術(shù)組人數(shù)14解:設(shè)航模組有人。14+=25(1)14+=25“1”Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.航模
6、組有20人,美術(shù)組人數(shù)比航模組多。美術(shù)有多少人?14航模組:美術(shù)組:?人20人多14航模組的14航模組人數(shù)+多的人數(shù)=美術(shù)組人數(shù)航模組人數(shù)×(1+)=美術(shù)組人數(shù)1414人20×20+1420×(1)14+20×Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.美術(shù)組有24人,美術(shù)組人數(shù)比航模組少。航模組有多少人?14航模組人數(shù)-少的人數(shù)=美術(shù)組人數(shù)航模組人數(shù)×
7、(1-)=美術(shù)組人數(shù)14解:設(shè)航模組有人。14-=24(1)14-=24少14航模組:美術(shù)組:人航模組的1414人Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.全課小結(jié)1、這節(jié)課,我們主要用什么知識(shí)解決問(wèn)題?2、列方程解決分?jǐn)?shù)除法問(wèn)題,你認(rèn)為最關(guān)鍵的步驟是什么?Evaluationonly.CreatedwithAspose.Slidesfor.NET3.
8、5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.楊樹(shù)有120棵,楊樹(shù)棵數(shù)比柳樹(shù)多。柳樹(shù)有多少棵?15柳樹(shù)棵數(shù):楊樹(shù)棵數(shù):?棵是柳樹(shù)棵數(shù)的15120棵楊樹(shù)棵數(shù)+多的棵數(shù)=柳樹(shù)棵數(shù)楊樹(shù)棵數(shù)×(1+)=柳樹(shù)棵數(shù)1515+=120解:設(shè)柳樹(shù)有棵。25(1+)=120Evaluationonly.CreatedwithAspose.Slidesfor.