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第二十讲:思维导图助力数学学习(一)——不等式与不等式组 主讲人:安乐冉
","type":1},{"img_height":594,"img_size":66,"img_url":"https://ss-mpvolc.meipian.me/users/69002254/779bd9cb8b079b5d8fbc4f3aac0960c2__jpg.heic","img_width":794,"is_origin":false,"source":0,"text":"不等式与不等式组是七年级下册内容。不等式与不等式(组)在各类考试中也占有一定比例。现将本章内容做简单复习,希望能对大家有所帮助。
","type":1,"watermark":"?meipian-watermark/bucket/ivwen/key/dXNlcnMvNjkwMDIyNTQvNzc5YmQ5Y2I4YjA3OWI1ZDhmYmM0ZjNhYWMwOTYwYzJfX2pwZy5oZWlj/nickname/5a6J/userid/NjkwMDIyNTQ=/sign/c717e88aa0cd87238e16f2af24b4cc91"},{"source":0,"text":"第九章主要内容有:一元一次不等式(组)的概念,不等式的性质,一元一次不等式(组)的解法及其应用.
对于不等式的性质,要注意正确判断不等号的方向,特别是不等式两边乘或除以同一个负数时,不等号的方向改变(下面的视频中涉及到对应的题型).
对于一元一次不等式的解法,要根据具体不等式,选择恰当的步骤获得解集,并能够用数轴正确表示解集.
对于一元一次不等式的应用,要能够从实际问题中找出不等关系,并设合理未知数、列不等式,从而把实际问题转化为数学问题.
对于一元一次不等式组,要能够用数轴确定不等式组的解集.
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","type":1},{"img_height":594,"img_size":66,"img_url":"https://ss-mpvolc.meipian.me/users/69002254/779bd9cb8b079b5d8fbc4f3aac0960c2__jpg.heic","img_width":794,"is_origin":false,"source":0,"text":"不等式与不等式组是七年级下册内容。不等式与不等式(组)在各类考试中也占有一定比例。现将本章内容做简单复习,希望能对大家有所帮助。
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对于不等式的性质,要注意正确判断不等号的方向,特别是不等式两边乘或除以同一个负数时,不等号的方向改变(下面的视频中涉及到对应的题型).
对于一元一次不等式的解法,要根据具体不等式,选择恰当的步骤获得解集,并能够用数轴正确表示解集.
对于一元一次不等式的应用,要能够从实际问题中找出不等关系,并设合理未知数、列不等式,从而把实际问题转化为数学问题.
对于一元一次不等式组,要能够用数轴确定不等式组的解集.
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