Автор - leksin

(1 – 4 / 9) / (1 / 3 – 1 / 4)

Ответ

Автор - koshkat
(1-4/9):(1/3-1/4)=6 2/3
1) 9/9-4/9=5/9
2) 1/3-1/4=4/12-3/12=1/12
3) 5/9:1/12=5/9·12/1=20/3=6 2/3

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