(1/4+1/4)-( 1/4+ 1/4)+ 1/4=1/4
(1/4-1/4)+ (1/4- 1/4)+ 1/4=1/4
(1/4 +1/4+ 1/4+ 1/4 )* 1/4=1/4
(1/4*1/4)-( 1/4*1/4)+ 1/4=1/4
反正前4个算起来是0就可以了
(1/4+1/4)-( 1/4+ 1/4)+ 1/4=1/4
(1/4-1/4)+ (1/4- 1/4)+ 1/4=1/4
(1/4 +1/4+ 1/4+ 1/4 )* 1/4=1/4
(1/4*1/4)-( 1/4*1/4)+ 1/4=1/4
反正前4个算起来是0就可以了