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学生每天的学习,在教材中都有相应的内容,但是在每节内容后面,细细去挖掘,还有很多可以拓展的部分.数学课堂上的拓展,能激发学生探究欲望,新奇想象,不但能开阔学生的数学视野,还能激发学生学习、培养兴趣、提高思维能力及挑战精神,现以“三角形内角和”的拓展练习为例进行阐述.师:我们知道三角形内角和是180°,由内及外,
Students study every day, in the textbook has the corresponding content, but behind each section content, dig to dig, there are many parts can be expanded.Mathematics classroom development, can stimulate students to explore the desire, novelty, not only Can broaden students’ mathematical perspective, but also inspire students to learn, develop interest, improve thinking ability and the spirit of challenge, is to “Triangle and ” expansion exercises as an example to be explained. Division: We know that the interior angle and the triangle is 180 , From inside and outside,