專題簡析: 已知兩個(gè)數(shù)的和與兩個(gè)數(shù)間的倍數(shù)關(guān)系,,求這兩個(gè)數(shù)分別是多少,像這樣的應(yīng)用題,,通常叫做和倍問題,。要想順利地解答和倍應(yīng)用題,最好的方法就是根據(jù)題意,,畫出線段圖(即示意圖),,使數(shù)量關(guān)系一目了然,從而正確列式解答,。 解答和倍應(yīng)用題,,關(guān)鍵是要找出兩數(shù)的和以及與其對(duì)應(yīng)的倍數(shù)和,從而先求出1倍數(shù),,再求出幾倍數(shù),。數(shù)量關(guān)系可以這樣表示: 兩數(shù)和÷(倍數(shù)+1)=小數(shù)(1倍數(shù)) 小數(shù)×倍數(shù)=大數(shù)(幾倍數(shù)) 兩數(shù)和-小數(shù)=大數(shù) |
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