题目1:畜牧场养山羊、绵羊800只,山羊的2/5比绵羊的1/2多50只,这个畜牧场山羊、绵羊各多少只?此题数量关系抽象,隐蔽性强。解题的关键在于重新组合数量关系,明朗题目的潜在联系,进行巧思妙解。解法1:由“山羊的2/5比绵羊的1/2多50只”→山羊的4/5比绵羊多100只→绵羊的只数+100=山羊的4/5→假设绵羊增加100只,则总只数为:900只,900只相当于山羊的1 4/5。故山羊有:(800+50×2) Question 1: Livestock raising goats, 800 sheep, goat 2/5 than the sheep more than 50/50, the number of livestock farms goats, sheep each? The number of abstract relationship, hidden. The crux of the problem lies in the reorganization of the quantitative relationship between the potential problems of a clear topic, ingenuity. Solution 1: 2/5 from “goats” 50 more than sheep "→ 4/5 goats more than sheep → number of sheep + 100 = 4/5 of goats → increase in sheep 100, then the total number is only 900, 900 equivalent to 14 4 goats. So the goats are: (800 + 50 × 2)