看图
我用a来表示1/2 1.a*a+a*a-a=0 2.a*a+a*a+a=1 3.(a/a+a/a)/a=4 4.(a+a+a)/(a*a)=6/就是÷
{1/2-1/2}*[1/2+1/2+1/2}=0{{1/2+1/2+1/2+1/2}*[1/2}=1{{1/2+1/2+1/2+1/2}/[1/2}=4{1/2+1/2+1/2}/{1/2*1/2}=6
真快
