2) (7 - 1 5/12) : 6,7 + (5,75 - 3 1/6) : 15,5

(7 - 1 5/12) : 6,7 + (5,75 - 3 1/6) : 15,5 = 1

1) 7 - 1 5/12 = 6 12/12 - 1 5/12 = 5 7/12

2) 5 7/12 : 6,7 = 67/12 : 67/10 = 67/12 * 10/67 = 10/12 = 5/6

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3) 5,75 - 3 1/6 = 5 3/4 - 3 1/6 = 5 9/12 - 3 2/12 = 2 7/12

4) 2 7/12 : 15,5 = 31/12 : 155/10 = 31/12 * 10/155 = (1*5)/(6*5) = 5/30 = 1/6

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5) 5/6 + 1/6 = 6/6 = 1

Ответ: 1.