手绘思维导图备数学课！ 锐角、直角的认识这节课上完反思: 1.分完类后，学生将钝角的新知马上说出来了，师追问：你好厉害呀！怎样的角叫钝角呢？
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2018-10-17 -
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2018-10-17
手绘思维导图备数学课！
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