(-2/3)-(-17/5)+(+13/5)-(16/3) 要过程

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(-2/3)-(-17/5)+(+13/5)-(16/3)要过程(-2/3)-(-17/5)+(+13/5)-(16/3)要过程(-2/3)-(-17/5)+(+13/5)-(16/3)要过程(-2/

(-2/3)-(-17/5)+(+13/5)-(16/3) 要过程
(-2/3)-(-17/5)+(+13/5)-(16/3) 要过程

(-2/3)-(-17/5)+(+13/5)-(16/3) 要过程
(-2/3)-(-17/5)+(+13/5)-(16/3)
=-2/3+17/5+13/5-16/3
=-2/3-16/3+17/5+13/5
=-18/3+30/5
=-6+6
=0

=-2/3+17/5+13/5-16/3
=(-2/3-16/3)+(17/5+13/5)
=-6+6
=0