Пошаговое объяснение:
1) 6 1/7 : 1/7 = 43/7 * 7/1 = 43/1 = 43
2) 4 3/5 * 15/28 = 23/5 * 15/28 = 23/1 * 3/28 = 69/28 = 2 13/28
3) (2 1/3)² : (1/3)³ = (7/3)² : 1/27 = 49/9 * 27/1 = 49/1 * 3/1 = 147/1 = 147
4) 43 - 2 13/28 + 147 =
(43+147) - 2 13/28 =
190 - 2 13/28 = 189 28/28 - 2 13/28 =
187. 15/28
