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本文以北师大版《数学》《一元二次方程》的教学为例,探讨一下关于实际背景下最大面积问题的教学思路.一、合作探究问题1某农场要建一个长方形的养鸡场,鸡场的一边靠墙(墙长25m),另外三边用木栏围成,木栏长40m.(1)鸡场的面积能达到180m~2吗?能达到200 m~2吗?(2)鸡场的面积能达到250 m~2吗?如果能,请你设计方案;如果不能,请说明理由.解设垂直于墙的一边长为xm,则另一
This article takes the teaching of “Mathematics” and “one quadratic equation” of Beijing Normal University as an example to explore the teaching ideas on the largest area under the actual background.First, the cooperative exploration of the problem 1 A farm to build a rectangular chicken farm, The side of the chicken farm is adjacent to the wall (the wall is 25m long), and the other three sides are surrounded by a wooden fence with a length of 40m. (1) The area of the farm can reach 180m ~ 2? Can it reach 200m ~ 2? If you can, please design the plan, if not, please explain the reason. Set up a wall perpendicular to the side of the length of xm, then the other