已知有理数abc在数轴上如图所.化简|c|+|a-c|-|c+b|+|a+b|___b_________c_____0____a_________有图所示|B|>|A| |C|>|A|

问题描述:

已知有理数abc在数轴上如图所.化简|c|+|a-c|-|c+b|+|a+b|
___b_________c_____0____a_________
有图所示|B|>|A| |C|>|A|

|c|+|a-c|-|c+b|+|a+b|
=-c+a-c-(-c-b)-b-a
=-c

|c|+|a-c|-|c+b|+|a+b|
=(-c)+(a-c)-(-c-b)+(-a-b)
=-c