Пошаговое объяснение:
1) 1. 1/3 : 2. 1/4 =
4/3 : 9/4 = 4/3 * 4/9 = 16/27
2) 16/27 + 2 = 2. 16/27
3) 2. 1/4 * 2. 16/27 = 9/4 * 70/27 = 1/2 * 35/3 = 35/6 = 5. 5/6
4) 4. 1/8 - 5. 5/6 =
4. 3/24 - 5. 20/24 =
-1. 17/24
