Выполнить действия: 1)13-(6.6-2ц8/15)*3 ; 2)50-(3ц3/4+6.5)/0.25

1) 13-(6.6-2 8//15)*3=13-(6.6-38//15)*3=13-61//15*3=13-12.2=0.8   2 8//15=38//15 6.6-38//15=61/15 61/15*3=12.2 13-12.2=0.8   2) 50-(3 3//4+6.5)/0.25=50-(15//4+6.5)/0.25=50-(3.75+6.5)/0.25=50-10.25/0.25=50-41=9 3 3//4=15//4 15//4=3.75 3.75+6.5=10.25 10.25/0.25=41 50-41=9 // - черта дроби