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一、情景引入,激发探究兴趣师:孩子们,老师这里有3根火腿肠打算分给两名同学,分给一人1根,一人2根,你们同意吗?生:不同意,一人多一人少。师:那怎么才能让他们满意呢?生:先一人分一个,再把剩下的一个分一半就行了。师:找一名同学拿刀分(分的长度不一样),这样分你们俩满意吗?生:不满意,这不是一半。师:那老师来分一下吧。这回比较一下满意了吗?生:满意,因为我们分的一样多。师:孩子们,你们知道吗?老师在分的时候可是有技巧的,是
First, the introduction of the scene, to stimulate the exploration of interest Teachers: children, teachers There are three ham intend to be assigned to two students, assigned to one person, two people, do you agree? Health: do not agree, one more people less . Teacher: Then how can we make them happy? Health: first one person, then the remaining one and a half on the line. Teacher: Find a classmate to take a knife points (the length of the points are not the same), so points you both satisfied? Health: not satisfied, this is not half. Teacher: That teacher to share it. Satisfied with this time than it? Health: satisfied, because we divided as much. Teacher: Kids, do you guys know? The teacher is skillful when he points