Пошаговое объяснение:
2-1 1/15=1 15/15-1 1/15=14/15
14/15:4/25=14/15*25/4=35/6=5 5/6
5 7/8-5 5/6=5 21/24-5 20/24=1/24
1/24+5/6=1/24+20/24=21/24=7/8
5 7/8-(2-1 1/15):4/25+5/6=5 7/8-(30/15-16/15):4/25+5/6)=5 7/8-14/15*25/4+5/6=5 7/8-35/6+5/6=
5 7/8-40/6=47/8-40/6=141/24-160/24=-19/24
