Предвадительно сократив дроби, найдите значение выражения 30/54+22/30 28/40-10/75 12/27+14/21 14/24-15/40 12/18-5/60 4/24+3/36

30/54 + 22/30 = 5/9 + 11/15 = 15/45 + 33/45 = 48/45 = 16/15 = 1 1/15;

28/40 - 10/75 = 7/10 - 2/15 = 21/30 - 4/30 = 17/30;

12/27 + 14/21 = 4/9 + 2/3 = 4/9 + 6/9 = 10/9 = 1 1/9;

14/24 - 15/40 = 7/12 - 3/8 = 14/24 - 9/24 = 5/24;

12/18 - 5/60 = 2/3 - 1/12 = 8/12 - 1/12 = 7/12;

4/24 + 3/36 = 1/6 + 1/12 = 2/12 + 1/12 = 3/12 = 1/4.