"(2 5/9 -1 20/21 ) : 1 8/49 + 1 8/9 : 6"

Question

"(2 5/9 -1 20/21 ) : 1 8/49 + 1 8/9 : 6"

Answer 1

Решение смотри в приложении

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Answer 2

1)2 5/9-1 20/21=2 35/63-1 60/63=1 98/63-1 60/63=38/63
2)38/63:1 8/49=38/63*49/57=14/27
3)1 8/9:6=17/9*1/6=17/54
4)14/27+17/54=28/54+17/54=45/54=5/6