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
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