а)-2:1 = -2/1 = -2,0 в) 9:(-3) = -9/3 = -3,0 д)-80:20 = -80/20 = -4,0 б)-21:(-6) = 21/6 = 3,5 г)-26:8 = -26/8 = -3,25 е)-15:(-2) = 15/2 = 7,5