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排列、组合的内容虽然在中等数学教学中所占比重不大,但却是今后学习概率统计的基础。而且通过排列、组合的教学,可以开发学生智力,提高他们分析问题、解决问题的能力。然而,不少学生学习这部分内容时觉得应用题难做,往往感到无从下手,从而失去学习的信心。因此,教师一定要精心组织教学,要在激发学习兴趣,发展思维能力上下功夫。一、精选例题,激发兴趣例1 某校位于山脚下,要组织一次登山活动。已知从前山上山有五条路,从后山上山有六条路,另有一条索道从山顶直通山下供下山用(索道只能下
Arrangement, combination of content, although the proportion of secondary mathematics teaching is not, but it is the basis for learning probability statistics. And through the arrangement, combination of teaching, you can develop student intelligence, improve their ability to analyze and solve problems. However, many students think this part of the content of the application difficult to do, often feel unable to start, thus losing the confidence to learn. Therefore, teachers must be carefully organized teaching, to stimulate interest in learning, develop their thinking ability. A selection of examples to stimulate interest Example 1 a school located at the foot of the mountain, to organize a mountaineering activities. Known from the mountains before the mountain has five roads, mountains from the back of the mountain there are six roads, and another cable from the mountain through the mountain for use down the mountain (ropeway only