-(9分之1)+(-3分之2)-(-3分之1)-(+4分之3)怎么去括号
问题描述:
-(9分之1)+(-3分之2)-(-3分之1)-(+4分之3)怎么去括号
答
-1/9+(-2/3)-(-1/3)-(+3/4)
=-1/9-2/3+1/3-3/4
=-1/9-1/3-3/4
=-(1/9+1/3+3/4)
=-43/36.
(去括号按照负负得正,正负得负的法则来就行.)