【教学过程】一、尝试寻找方法,亲历探究过程师:老师带来了三个分数:2/3、6/7和3/4,你觉得哪个最大?哪个最小?生:可能是6/7比较大。师:你们的判断到底是不是正确的呢?那就要拿出你的证据来。可以通过画图、算式或其他的方法来证明你的判断,比比谁想到的方法最多。二、交流多种方法,培养思维能力师:同学们,我看到大家用了很多方法来证明自己的判断,下面我们先请这些同学上 [Teaching process] First, try to find ways to experience the process engineer: teacher brought three scores: 2 / 3,6 / 7 and 3/4, which do you think the maximum? Which is the smallest? Health: may be 6/7 bigger. Teacher: Is your judgment correct? Then show your evidence. You can prove your judgment by drawing, calculating or other ways than by thinking of the most. Second, the exchange of a variety of ways to develop thinking ability Teacher: Students, I see you use a lot of ways to prove their own judgments, let’s first of these classmates