А)3/8+1/6 б)4/5-3/10 в)1/12+1/10 г)9/20-1/30 заранее *!

А) 3/8 + 1/6 = 9/24 + 4/24 = 13/24
б) 4/5 - 3/10 = 8/10 - 3/10 = 5/10 = 1/2
в) 1/12 + 1/10 = 5/60 + 6/60 = 11/60
г) 9/20 - 1/30 = 27/60 - 2/60 = 25/60 = 5/12

А) 13/24
Б)1/2
В)11/60
Г)5/12