1. 9-5 3/8=9-43/8=29/8=3 5/8 (4)

2. 7 2/11-5 1/2=79/11-11/2=37/22=1 15/22 (1)

3. 8 5/6+б=11 1/12

б=11 1/12-8 5/8

б=133/12-53/6

б=9/4

б=2 1/4 (3)

4. =(18/5-7/6)+12/5=73/30+12/5=29/6=4 5/6 (3)

5. 2