А) 5\9 - 1\3; б) 7\10 - 3\5; в) 16\27 - 1\9; г) 3\5 - 13\45; д) 1\3 - 8\27; е) 1\2 - 1\3; ж) 3\5 - 1\3; з) 7\8 - 2\3;

А) 5/9 - 1/3 = 5/9 - 3/9 = 2/9;

б) 7/10 - 3/5 = 7/10 - 6/10 = 1/10;

в) 16/27 - 1/9 = 16/27 - 3/27 = 13/27;

г) 3/5 - 13/45 = 27/45 - 13/45 = 14/45;

д) 1/3 - 8/27 = 9/27 - 8/27 = 1/27;

е) 1/2 - 1/3 = 3/6 - 2/6 = 1/6;

ж) 3/5 - 1/3 = 9/15 - 5/15 = 4/15;

з) 7/8 - 2/3 = 21/24 - 16/24 = 5/24;

и) 3/4 - 4/7 = 21/28 - 16/28 = 5/28;

к) 9/16 - 11/24 = 27/48 - 22/48 = 5/48;

л) 11/12 - 11/18 = 33/36 - 22/36 = 11/36.