Вычислите -3/5-1/5; -1/3-2/3; -3/7-4/7;
-3/5 - 1/5 = -1/3 - 2/3 = -3/3 = -1 -3/7 - 4/7 = -7/7 = -1
-3/5-1/5=-4/5 -1/3-2/3=-3/3=-1 -3/7-4/7=-7/7=-1