1) (24)5/6 + (18)2/3 = (24)5/6 + (18)4/6 = (42)9/6 = (42)3/2 = (43)1/2
2) (43)1/2 - (32)5/18 = (43) 9/18 - (32)5/18 = (11)4/18 = (11)2/9 - собрал Петрик
3) (24)5/6 - (11)2/9 =(24)15/18 - (11)4/18 = (13)11/18 - собрал Сергей
4) (18)2/3 - (11)2/9 = (18)6/9 - (11)2/9 = (7)4/9 - собрала Оксана