Пошаговое объяснение:
1)
-2. 1/2 : 3. 1/3 = -5/2 : 10/3 = -5/2 * 3/10 = -1/2 * 3/2 = -3/4
3)
3. 3/8 : (-2. 1/4) = 27/8 : (-9/4) = 27/8 * (-4/9) = 3/2 * (-1/1) = -3/2 = -1. 1/2
5)
-5. 4/9 : (-2. 1/3) = -49/9 : (-7/3) = -49/9 * (-3/7) = -7/3 * (-1/1) = 7/3 = 2. 1/3
