Выполните действия: А) 3 + 8 5/12; Д) 4 8/11 + 5 7/11 Б) 10 6/7 - 3; Е) 7 5/9 - 2 8/9 В) 4 2/13 + 5 7/13; Ж) 7 - 3/8

А) 3 + 8 5/12 = 3 + (8 * 12 + 5)/12 = 3 + (96 + 5)/12 = 36/12 + 101/12 = (36 + 101)/12 = 137/12;

Д) 4 8/11 + 5 7/11 = (4 * 11 + 8)/11 + (5 * 11 + 7)/11 = (44 + 8)/11 + (55 + 7)/11 = 52/11 + 62/11 = (52 + 62)/11 = 114/11;

Б) 10 6/7 - 3 = (10 * 7 + 6)/7 - 3 = (70 + 6)/7 - 3 = (76 - 21)/7 = 55/7;

Е) 7 5/9 - 2 8/9 = (7 * 9 + 5)/9 - (2 * 9 + 8)/9 = 68/9 - 26/9 = 42/9;

В) 4 2/13 + 5 7/13 = (4 * 13 + 2)/13 + (5 * 13 + 7)/13 = 54/13 + 72/13 = 126/13;

Ж) 7 - 3/8 = 56/8 - 3/8 = 53/8;

Г) 8 7/12 - 4 2/12 = (8 * 12 + 7)/12 - (4 * 12 + 2)/12 = 103/12 - 50/12 = 153/12;

З) 10 - (3 * 15 + 7)/15 = 150/15 - 52/15 = 98/15.