Пошаговое объяснение:
1) 2. 1/6 + 3. 1/4 = 2. 2/12 + 3. 3/12 = 5. 5/12
2) 5. 5/12 : 2. 3/5 = 65/12 : 13/5 = 65/12 * 5/13 = 5/12 * 5/1 = 25/12 = 2. 1/12
3) 2/62 * 5. 1/6 = 2/62 * 31/6 = 1/2 * 1/3 = 1/6
4) 2/3 * 9/4 = 1/1 * 3/2 = 3/2 = 1. 1/2
5) 1/6 + 2. 1/12 - 1. 1/2 =
2/12 + 2. 1/12 - 1. 6/12 =
2. 3/12 - 1. 6/12 =
1. 15/12 - 1. 6/12 =
9/12 = 3/4
ответ: 3/4
