78 37/48+(39 23/24+14 15/16)=133 2/3
1)39 23/24+14 15/16=959/24+239/16=1918/48+717/48=2635/48
2)78 37/48+2635/48=3781/48+2635/48=6416/48=401/3=133 целых 2/3.
304 59/80+(99 21/40+14 127/160)=419 9/60
1) 99 21/40+14 127/160=3981/40+2367/160=15924/160+2367/160=18291/160
2) 304 59/80+18291/160=24379/80+18291/160=48758/160+18291/160=
=67049/160=419 целых 9/60