A) 12 5/6-6 1/4-1 1/3= б) 8 3/8-(5 5/6+1 3/4)= в)11-(4 5/6+3 3/8)=

А)=77/6-25/4-4/3=154-75-16/12=63/12=21/4=5 1/4
б)=67/8-(35/6+7/4)=67/8-(70/12+21/12)=67/8-91/12=-201/24-182/24=-383/24=-15 23/24
в)11-(29/6+27/8)=11-(116/24+81/24)=11-197/24=264/24-197/24=67/24=2 19/24