Выполните действия 9 7/12-4 5/12-(2 3/4-1 3/4)= 8 7/15 - 3 1/15 + 4 4/15

9 7/12-4 5/12-(2 3/4-1 3/4)= 4 1/6
1)2 3/4  -  1 3/4 = 11/4  -  7/4 =  4/4 = 1
2)9 7/12  -  4 5/12 = 115/12  -  53/12 =   62/12 = 31/6 = 5 1/6
3)5 1/6  -  1 = 31/6  -  1 =(31 × 1  -  1 × 6)/6 = 31/6  -  6/6 =  25/6 = 4 1/6
8 7/15 - 3 1/15 + 4 4/15= 9 2/3
1)8 7/15  -  3 1/15 = 127/15  -  46/15 =  81/15 = 27/5 = 5 2/5
5 2/5+4 4/15=27/5  +  64/15 = (27 × 3  +  64 × 1)/15 = 81/15  +  64/15 =  145/15 = 29/3 = 9 2/3