А) (4/7) / (5/17) = (4/7) * (17/5) = 68/35
б) (3/8) / (9/16) = (3/8) * (16/9) = 6/3 = 2
в) (7 11/12) / (3 1/6) = ((712 + 11)/12) / ((36 + 1)/6) = (95/12) / (19/6) = (95/12) * (6/19) = 570/228 = 95/38
г) 48 / (12/13) = 48 * (13/12) = 52
д) (15/16) / 5 = (15/16) * (1/5) = 3/16
1) Стоимость 1 кг конфет: 15 * (9/5) = 27 грн.
2) Длина всей дороги: (50 km) / (5/9) = 90 km.
А) (4/7) / (5/17) = (4/7) * (17/5) = 68/35
б) (3/8) / (9/16) = (3/8) * (16/9) = 6/3 = 2
в) (7 11/12) / (3 1/6) = ((712 + 11)/12) / ((36 + 1)/6) = (95/12) / (19/6) = (95/12) * (6/19) = 570/228 = 95/38
г) 48 / (12/13) = 48 * (13/12) = 52
д) (15/16) / 5 = (15/16) * (1/5) = 3/16
1) Стоимость 1 кг конфет: 15 * (9/5) = 27 грн.
2) Длина всей дороги: (50 km) / (5/9) = 90 km.