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Verified answer

1) 3/4 - 1/3 = 9/12 - 4/12 = 5/12
2) 5/12 : 5/7 = (5*7)/(12*5) = 7/12
3) 1/4 + 2/3 =3/12 + 8/12 = 11/12
4) 11/12 * 6/11 = 1/2
5) 7/12 : 1/2 = 7/6 = 1 1/6
Ответ в примере: 1 1/6