有理数a、b在数轴上位置如图所示,试化简 |a-b|-|a+b|+2|b-2a|··········································b 0 a

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有理数a、b在数轴上位置如图所示,试化简 |a-b|-|a+b|+2|b-2a|··········································b 0 a
有理数a、b在数轴上位置如图所示,试化简 |a-b|-|a+b|+2|b-2a|
··········································
b 0 a

有理数a、b在数轴上位置如图所示,试化简 |a-b|-|a+b|+2|b-2a|··········································b 0 a
a>0>b
故a-b>0
b-2a