21/8 =2 5/8 = 2,625
Пошаговое объяснение:
(7/9 - 1/6) : 2/9 * 21/22 = 11/18 * 9/2 * 21/22 = 1/18 * 9/2 * 21/2 = 1/2 * 1/2 * 21/2 = 21/8 =2 5/8 = 2,625
21/8 =2 5/8 = 2,625
Пошаговое объяснение:
(7/9 - 1/6) : 2/9 * 21/22 = 11/18 * 9/2 * 21/22 = 1/18 * 9/2 * 21/2 = 1/2 * 1/2 * 21/2 = 21/8 =2 5/8 = 2,625