(40 61/80-7 17/20)+25 3/40 заранние благодорю

Question

(40 61/80-7 17/20)+25 3/40 заранние благодорю

Answer 1

1)40 61/80-7 17/20=40 61/80-7 68/80=39 141/80-7 68/80=32 73/80
2)32 73/80+25 3/40=32 73/80+25 6/80=57 79/80