Вычислите 1) (- 5\12 -3\4):2 1\3 + 5 1\3 *0,75 2) (-2,5 -1 5\6): 1 4\9 -3 5\9*(-2 1\4)

1). (- 5\\12 - 3\\4) /2 1\\3 + 5 1\\3 * 0,75 = 3,5Первое действие.-5/12 - 3/4 = -5/12 - 9/12 = (-5 - 9)/12 = -14/12 = - 7/6 = -1 1/6;Второе действие.-1 1/6 / 2 1/3 = -7/6 / 7/3 = -7/6 * 3/7 = -7 * 3/6 * 7 = -21/42 = -1/2 = -0,5;Третье действие.5 1/3 * 0,75 = 16/3 * 75/100 = 16 * 75/3 *100 = 1200/300 = 4;Четвертое действие.-0,5 + 4 = 3,5;2). (-2,5 - 1 5\\6) / 1 4\\9 - 3 5\\9 * (-2 1\\4) = 5;1. -2,5 - 1 5/6 = -2 5/10 - 11/6 = -25/10 - 11/6 = -75/30 - 55/30 = (-75 - 55)/30 == -130/30 = -13/3 = -4 1/3;2. -4 1/3 / 1 4/9 = -13/3 / 13/9 = -13/3 * 9/13 = -13 *9/3 * 13 = -117/39 = -3;3. 3 5/9 * (-2 1/4) = 32/9 * (-9/4) = 32 * (-9)/9 * 4 = -288/36 = -8;4. -3 - (-8) = -3 + 8 = 5;