Б) 1) 1/3 + 1/4 = (4 * 1)/12 + (3 * 1)/12 = 4/12 + 3/12 = 7/12;
2) 2 - 5/6 = 1 6/6 - 5/6 = 1 1/6;
3) 7/12 : 1 1/6 = 7/12 : 7/6 = 7/12 * 6/7 = 1/2 * 1/1 = 1/2.
Объяснение:
