Ответ:  2/9.

Пошаговое объяснение:

(2/3 + 1 1/7 * 7/18): 5 = 2/9.

1)  1 1/7*7/18 = 8/7 * 7/18 = 8/18 = 4/9;

2)  2/3+4/9 => НОК(3;9) = 9 => 6/9+4/9 = 10/9 = 1 1/9;

3)  1 1/9:5 = 10/9 :5 = 10/9*1/5 = 2/9.

Verified answer

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