в) -1:(-2/3)е)-2/3:(-1)и)-1/5:11/15 Г)-12*(3/4-2)*5/12в)-1:(-2,5) б)-5/6+5)*(-2,15)е)-15,9:(-1) )г)-2*(-2,5-2,6) и)-99,1:(-9,91) б)-5*(0,4+6)

в) -1 : (-2/3) = 1 * 3/2 = 3/2;

е) -2/3 : (-1) = 2/3 * 1 = 2/3;

и) -1/5 : 11/15 = -1/5 * 15/11 = -3/11;

Г) -12 * (3/4 - 2) * 5/12 = -12 * (3/4 - 8/4) * 5/12 = -12 * (-5/4) * 5/12 = 12 * 25/(4 * 12) = 25/4;

в) -1 : (-2,5) = 1 : 25/10 = 10/25 = 2/5;

б) (-5/6 + 5) * (-2,15) = (-5/6 + 30/6) * (-215/100) = 25/6 * (-43/20) = -5 * 43/(6 * 4) = -215/24;

е) -15,9 : (-1) = 15,9;

г) -2 * (-2,5 -2,6) = -2 * (-5,1) = 10,2;

и) -99,1 : (-9,91) = 99,1 : 9,91 = 10;

б) -5 * (0,4 + 6) = -5 * 6,4 = -32.