【问题描述】将一块长50分米、宽12分米的长方形布剪成直角边长为4分米的等腰直角三角形,最多能剪多少个这样的三角形?这道习题,相信数学教师都不陌生。题目看似简单,但学生解答的错误率很高,我在五年级一个班做了检测,错误率竟高达82%。这是什么原因呢?笔者以为,主要原因在于学生缺乏相关的生活经验和实际操作的支持。他们只能从已 [Problem Description] Will be a 50-meter-long, 12-meter-wide rectangular cloth cut into four-meter-long rectangular isosceles right-angled triangle at most up to cut how many of these triangles? This exercise, I believe math teachers Not strange. The problem seems simple, but the error rate of students to answer high, I did a test in the fifth grade, the error rate was as high as 82%. What is the reason? I think the main reason is that students lack the relevant life experience and practical support. They can only do it already