Выполните действия 1). (1/12+1/6):(3/8-1/4) 2). (1-4/9):(1/3-1/4)
1. (1/12+1/6):(3/8-1/4)=1/4:1/8=2 2. (1-4/9):(1/3-1/4)= 5/9:1/12=20/3