(-1/4)+1/2= (-4/7)+1/14= 2/3+(-1/6)= решите пожалуйста !
(–1/4)+(1/2)=(–1/4)+(2/4)=(1/4) (–4/7)+(1/14)=(–8/14)+(1/14)=(-7/14)=(-1/2) (2/3)+(–1/6)=(4/6)+(-1/6)=3/6=1/2