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一题多解是数学教学中的一种高效的教学方法.借一题之力,牵动多个知识点,加强知识点间的纵横联系,可以达到培养学生思维的灵活性和广阔性的目的,同时也可以在时间紧、强度大的中考复习阶段使学生快速地掌握所学概念、定理的应用.下面以2012年深圳中考题的第16题(填空题)为例,谈一点看法.题目:如图,Rt△ABC中,∠C=90°,以斜边AB为边向外作正方形ABDE,且正方形对角线交于点O,连结OC,已知AC=5,OC=62~(1/2),则另一直角边BC的长为
One question and multiple solutions is an efficient teaching method in mathematics teaching.Using the power of one question to influence multiple knowledge points and strengthen the vertical and horizontal connection between knowledge points can achieve the purpose of cultivating the flexibility and broad thinking of students’ At the same time, you can quickly grasp the concept and application of the concepts and theorems in the tight exam time and intensive exam refresher stage.The following is a brief introduction to the 16th exam (fill in the blank) of the 2012 Shenzhen exam: As shown in the figure, Rt △ ABC, ∠C = 90 °, the hypotenuse AB as the side outward for the square ABDE, and the square diagonal intersect at the point O, link OC, known AC = 5, OC = 62 ~ 1/2), the length of the other right-angled edge BC is