Вычислите: а) 11 целых 1/3*3 б)-3 целых 3/4*1/5 в)-6 целых 2/5*(-7 целых 1/2) г) 13/50:(-13/25)

а) 11 1/3 * 3 = (11 * 3 + 1)/3 * 3 = 33 + 1 = 34;

б) -3 3/4 * 1/5 = -(3 * 4 + 3)/4 * 1/5 = -(12 + 3)/(4 * 5) = -15/20 = -3/4;

в) -6 2/5 * (-7 1/2) = (6 * 5 + 2)/5 * (7 * 2 + 1)/2 = (30 + 2)/5 * (14 + 1)/2 = 32/5 * 15/2 = (32 * 15)/(5 * 2) = 16 * 3 = 48;

г) 13/50 : (-13/25) = -13/50 * 25/13 = -(13 * 25)/(50 * 13) = -1/2.