论文部分内容阅读
期末考试如期而至,数学试卷的“解决问题”中有这样一道题:如图1,三角形ABC是等腰直角三角形,面积为10平方分米,AB是圆的直径,求阴影①的面积与阴影②的面积相差多少平方分米。这道题马上引起了我的注意,仔细看后心中暗想:坏了,还没有来得及给学生讲这类题。于是,忐忑不安的我轻声问了几个外班的学生,有的回答“老师讲了”(其实学生误以为是那种“切割移补”那一类题了),有的回答说:“没有。”心中的担忧和后怕便油然而生。根据我校试卷批改制度规定,六年级试卷由五年级数学教师来批A B C O图1
The final exam comes as scheduled, mathematics papers “problem solving ” There is such a problem: Figure 1, triangle ABC is isosceles right triangle, an area of 10 square decimeters, AB is the diameter of the circle, Area and the shadow of the area of the difference between how many square decimeter. This question immediately caught my attention, a closer look after my heart thought: bad, have not had time to say such questions to students. So, uneasy I quietly asked a few foreign students, some answered “teacher said ” (in fact, the students mistaken for the kind of “cut and shift ” kind of question), and some answer Said: “No. ” The hearts of fear and scared will be spontaneously arises. According to my school examination paper batch system, sixth grade papers by the fifth grade mathematics teachers to grant A B C O Figure 1