Ответы и объяснения

2014-04-08T07:17:31+00:00
5/12-11/12=-6/12=-1/2
-5/6*(-2/5)=2/6=1/3
14/15:(-2/5)
=14/15*(-5/2)=-7/3=-2 1/3
2014-04-08T07:21:02+00:00
5/12-11/12= -1/2
-5/6*-2/5= 5/15=1/3
14/15:-2/5=14/15*-5/2= -14/6=-7/3=-2  1/3