1、若a>0,b<0,则a/丨a丨=____ b/丨b丨=____ ab/丨ab丨=____2、有理数a、b在数轴上的位置如图所示:(图贴在下面) 试化简丨a丨+丨b丨+丨a+b丨+丨a-b丨3、如果a表示一个有理数,试比较(-2/3)a和(-4
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![1、若a>0,b<0,则a/丨a丨=____ b/丨b丨=____ ab/丨ab丨=____2、有理数a、b在数轴上的位置如图所示:(图贴在下面) 试化简丨a丨+丨b丨+丨a+b丨+丨a-b丨3、如果a表示一个有理数,试比较(-2/3)a和(-4](/uploads/image/z/11946432-48-2.jpg?t=1%E3%80%81%E8%8B%A5a%EF%BC%9E0%2Cb%EF%BC%9C0%2C%E5%88%99a%2F%E4%B8%A8a%E4%B8%A8%3D____+++b%2F%E4%B8%A8b%E4%B8%A8%3D____++ab%2F%E4%B8%A8ab%E4%B8%A8%3D____2%E3%80%81%E6%9C%89%E7%90%86%E6%95%B0a%E3%80%81b%E5%9C%A8%E6%95%B0%E8%BD%B4%E4%B8%8A%E7%9A%84%E4%BD%8D%E7%BD%AE%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%EF%BC%9A%EF%BC%88%E5%9B%BE%E8%B4%B4%E5%9C%A8%E4%B8%8B%E9%9D%A2%EF%BC%89+++++%E8%AF%95%E5%8C%96%E7%AE%80%E4%B8%A8a%E4%B8%A8%2B%E4%B8%A8b%E4%B8%A8%2B%E4%B8%A8a%2Bb%E4%B8%A8%2B%E4%B8%A8a-b%E4%B8%A83%E3%80%81%E5%A6%82%E6%9E%9Ca%E8%A1%A8%E7%A4%BA%E4%B8%80%E4%B8%AA%E6%9C%89%E7%90%86%E6%95%B0%2C%E8%AF%95%E6%AF%94%E8%BE%83%28-2%2F3%29a%E5%92%8C%28-4)
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