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师:刚才我们已经概括出了分数的意义,老师这儿有两道题,请同学们练一练。 幻灯投影出第一道题:用分数表示下图中的阴影部分。
Teacher: Just now we have summed up the significance of the score. There are two questions for the teacher here. Please practice with them. Slide projection of the first question: the score that shades the figure below.