Ответ:
Пошаговое объяснение:
511.
3)
(5 6/7 + 3 5/21) * 2 1/10 = 19 1/10,
1)) 5 6/7 + 3 5/21 = 5 18/21 + 3 5/21 = 8 23/21 = 9 2/21,
2)) 9 2/21 * 2 1/10 = 191/21 * 21/10 = 191/10 = 19 1/10,
4)
(7 5/12 - 3 1/6) * 2 2/17 = 9,
1)) 7 5/12 - 3 1/6 = 7 5/12 - 3 2/12 = 4 3/12 = 4 1/4,
2)) 4 1/4 * 2 2/17 = 17/4 * 36/17 = 36/4 = 9