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ac>bc ab>cb a+c>b+c a+b>c+b
a﹣b>0 ab>0 a÷b>0
|a|<1<|b| 1<﹣a<b 1<|a|<b ﹣b<a<﹣1
ac>bc; ab>cb; a+c>b+c; a+b>c+b;
ab>bc; ac>bc; ac>ab; ab>ac;
、a>-b b-a<0 |a|>|b| a+b<0
a>b a>-b a<-b -a<-b
|a|<1<|b| 1<﹣a<b 1<|a|<b ﹣b<a<﹣1
c>b>a; │a│>│b│>│a│; │c│>│b│>│a│ │c│>│a│>│b│