Выполните действия: 1 целая 7/12: (3/8+5/12) 17/36: (7/12-5/9) (3/14+5/7): 3 целых 5/7 19/24: (3/16+5/24)

1. = 1 7/12:(9/24+10/24) = 1 7/12:19/24 = 19/12*24/19 = 2
2. =17/36: ( 21/36-20/36 ) = 17/36:1/36 = 17/36*36/1 = 17
3. = ( 3/14+10/14):26/7 = 13/14:26/7 = 13/14*7/26 = 1/4
4. = 19/24:(9/48+10/48) = 19/24:19/48 = 19/24*48/19 = 2