Выполните действие: 1) (112 + 16) : (3/8 - 1/4) 2) (1 - 49) : (13 - 14) 3) (13 - 516 ) : (16 - 18) 4) ( 57 - 23) : (49 - 512)

1) (112 + 16) : (3/8 - 1/4) =(1/12+2/12):(6/16-4/16)=1/4:1/8=1/4*8/1=22) (1 - 49) : (13 - 14)=(9/9-4/9):(4/12-3/12)=5/9:1/12=5/9*12/1=20/3=6 2/3 3) (13 - 516 ) : (16 - 18) =(16/48-15/48):(4/24-3/24)=1/48:1/24=1/48*24/1=1/24) ( 57 - 23) : (49 - 512)=(15/21-14/21):(16/36-15/36)=1/21:1/36=1/21*36/1=12/7=1 5/7

1)(1/12+1/6)÷(3/8-1/4)=(1/12+2/12):(3/8-2/8)=3/12÷1/8=1/4×8/1=2;2)(1-4/9)÷(1/3-1/4)=(9/9-4/9)÷(4/12-3/12)=5/9÷1/12=5/9×12/1=20/3=6 2/3;3)(1/3-5/16)÷(1/6-1/8)=(16/48-15/48)÷(4/24-3/24)=1/48÷1/24=1/48×24/1=1/2;4)(5/7-2/3)÷(4/9-5/12)=(15/21-14/21)÷(16/36-15/36)=1/21÷1/36=1/21×36/1=12/7=1 5/7.